Steps to reproduce:
1. Open https://www.speedscope.app/
2. Try to import an invalid file such as [invalid.json](https://github.com/jlfwong/speedscope/files/14167326/invalid.json). The page says "Something went wrong. Check the JS console for more details."
3. Now try to import a valid file such as [simple.json](https://github.com/jlfwong/speedscope/files/14167335/simple.json). The page says "Something went wrong. Check the JS console for more details." even though this second file is valid.
Explanation of the fix (copied from the commit message):
> We need to clear the error flag, otherwise once there is an error and we display "Something went wrong" we will keep displaying that forever even when the user imports a valid file.
The previous description ("event values will be relative to this
startValue") was ambiguous.
Suppose the profile starts at wall time 1000ms and the first event is
at wall time 1003ms.
The intention is that startValue should be set to 1000 and the "at"
value of the event should be set to 1003. The viewer's time axis will
start at 0ms and the first event will be displayed at 3ms.
But the previous description could be incorrectly interpreted as
saying that the "at" value of the first event should be set to 3 (the
time relative to startValue, as opposed to the absolute wall time).
Clarify that "relative" is referring to how the viewer displays the
data, not about which values to store in the file.
In the existing code, if `traceEvents` did not have any importable events, the profile would be marked as empty. This was a bug, as the dev Hermes profiles I was testing with had one X event which made the code work. However we do not need to guarantee (and the spec doesn't seem to) any traceEvents being present as long as we have samples and stack frames.
When I tested a production profile taken from Hermes it did not have any importable events, just a metadata event with a thread name. This PR updates the implementation to iterate over partitioned samples instead of traceEvents so we construct profiles for all thread + process pairs referenced in the samples array.
| Before | After |
| --- | ----- |
| <img width="1454" alt="Screenshot 2024-01-03 at 9 58 56 AM" src="https://github.com/jlfwong/speedscope/assets/9957046/78c098a7-b374-4492-ad13-9ca79afdb40c"> | <img width="1450" alt="Screenshot 2024-01-03 at 9 58 17 AM" src="https://github.com/jlfwong/speedscope/assets/9957046/d2d5e82b-fa3e-43db-bf8a-e8c3b84cd13a"> |
I have been taking a lot of profiles using the Hermes profiler, but I noticed that they sometimes to not show up properly. After debugging what exactly was going on, I realized it was because the logic in `selectQueueToTakeFromNext` only checks for name, instead of the key for the event. I had a bunch of events with the name `anonymous` that were getting improperly exited before they should have been due to this logic.
This fix makes the code more robust if there are added "args" which differentiate an event from another (as is the case in Hermes profiles), however it would still be an issue if they key just defaults to the name.
Example profile before:
<img width="1728" alt="Screenshot 2023-12-15 at 12 54 04 AM" src="https://github.com/jlfwong/speedscope/assets/9957046/345f556e-f944-40f1-b59c-748133acb950">
What it should look like (in Perfetto):
<img width="1051" alt="Screenshot 2023-12-15 at 8 51 38 AM" src="https://github.com/jlfwong/speedscope/assets/9957046/7473cdf8-95f1-49de-a0c7-ef4ac081ff85">
After the fix:
<img width="1728" alt="Screenshot 2023-12-15 at 12 54 29 AM" src="https://github.com/jlfwong/speedscope/assets/9957046/56b0870a-538b-4916-acc8-de2b7dfd78eb">
Wow this was surprising. As reported in #448, the `simple.speedscope.json` file failed import. This was surprising to me because there's a test that covers that file to ensure it imports correctly.
The file provided in #448, however, is from a version of speedscope from 5 years ago before the file had been pretty printed. It turns out that when this *particular* file is not pretty-printed, it's a schematically valid pprof profile.
The fix is to do some bounds checks and return null. After the change, the file imports as you'd expect after realizing its not actually a valid pprof profile.
Fixes#448
The publish, deploy, and release process is annoying enough at the moment that I avoid doing it frequently. Let's automate most of it to reduce the friction
Follow up on this PR #435.
Currently, it took roughly 22 seconds to load my 1.3GB file. After inspecting the profiler, there's a large chunk of time spending in Frame.getOrInsert. I figure we can reduce the number of invocations by half. It reduces the load time to roughly 18 seconds.I also tested with a smaller file (~350MB), and it show similar gains, about 15-20%
Currently, importing files generated by linux perf tool whose some blocks exceed V8 strings limit can crash the application. This issue is similar to the one in #385.
This PR fixes it by changing parseEvents to work directly with lines instead of chunking lines into blocks first.
Fixes#433
The current behavior of splitLines is to eagerly split all the lines and return an array of strings.
This PR improves this by returning an iterator instead, which will emit lines. This lets callers decide how to best use the splitLines function (i.e. lazily enumerate over lines)
Relates to #433
The previous behavior was to use the StartLine of a function as the line number to show in speedscope. However, the Line object has more precise line information, and we should only fallback to StartLine if we don't have this more detailed information.
Looking at the [documentation for the pprof proto](https://github.com/google/pprof/tree/main/proto#general-structure-of-a-profile), this is more how it intends to interpret line information:
> location: A unique place in the program, commonly mapped to a single instruction address. It has a unique nonzero id, to be referenced from the samples. It contains source information in the form of lines, and a mapping id that points to a binary.
> function: A program function as defined in the program source. It has a unique nonzero id, referenced from the location lines. It contains a human-readable name for the function (eg a C++ demangled name), a system name (eg a C++ mangled name), the name of the corresponding source file, and other function attributes.
Here is a sample profile that had line-level info on the Line object of the profile:
Before:
<img width="449" alt="Screen Shot 2022-11-03 at 11 17 11 AM" src="https://user-images.githubusercontent.com/618615/199760730-712daa70-6cfb-4e90-b037-b571809c26d9.png">
After:
<img width="449" alt="Screen Shot 2022-11-03 at 11 17 22 AM" src="https://user-images.githubusercontent.com/618615/199760777-1c0d5581-7b29-42b7-b642-6035f7d25405.png">
This attempts to improve the quality of the on-CPU profiles stackprof provides. Rather than weighing samples by their timestamp deltas, which, in our opinion, are only valid in wall-clock mode, this weighs callchains by:
```
S = number of samples
P = sample period in nanoseconds
W = S * P
```
The difference after this change is quite substantial, specially in profiles that previously were showing up with heavy IO frames:
* Total profile weight is almost down by 90%, which actually makes sense for an on-CPU profile if the app is relatively idle
* Certain callchains that blocked in syscalls / IO are now much lower weight. This was what I was expecting to find.
Here is an example of the latter point.
In delta mode, we see an io select taking a long time, it is a significant portion of the profile:
<img width="1100" alt="236936508-709bee01-d616-4246-ba74-ab004331dcd3" src="https://github.com/dalehamel/speedscope/assets/4398256/39140f1e-50a9-4f33-8a61-ec98b6273fd4">
But in period scaling mode, it is only a couple of sample periods ultimately:
<img width="206" alt="236936693-9d44304e-a1c2-4906-b3c8-50e19e6f9f27" src="https://github.com/dalehamel/speedscope/assets/4398256/7d19077f-ef25-4d79-980b-cfa1775d928d">
Sometimes, stackprof frames don't get generated with a `name` in the frame.
I think it's probably worth tracking down why that is, but in the mean
time, speedscope simply crashes with a method call on `undefined`. The
crash is bad because it only shows up in the console--there's no visible
message saying that speedscope failed to parse and load a profile.
For more information, see #378
This fixes the crash by simply skipping the logic in demangle if the name
field isn't present on a frame. That's probably a fine tradeoff? Because in
this case, stackprof is generating ruby frames, which means that C++ name
demangling won't apply.
I have tested this by running the scripts/prepare-test-installation.sh
script and verifying that `bin/cli.js` can now successfully load the
included profile. Before these changes, I verified that speedscope failed
with the behavior mentioned in #378.
I've also included a snapshot test case, but it seems that the Jest test
harness only tests the parsing, not the rendering (correct me if I'm wrong).
So I haven't actually been able to create an automated test that would catch
a regression. Please let me know if there's a better way to have written this
test.
I've staged the commits on this branch so that the second commit (dcb9840)
showcases the minimal diff to a stackprof file that reproduces the bug. That is,
rather than look at the thousands of new lines in the stackprof profile, you can
view the second commit to see the salient part of the file.
Fixes#415
* Interprets pprof's defaultSampleType as an index into the string table [as documented in the proto](https://github.com/jlfwong/speedscope/blob/0414c2f617742e7fb0cf31a66ac0f77c2f5c0540/src/import/profile.proto#L85), not as an index into the sample types repeated-field. This allows parsing to succeed when the string-table index is not a valid sampleTypes index, which is common on allocation profiles.
* Update the pprof snapshot. This is necessarily because we were previously interpreting an empty defaultSampleType as truthy-but-zero when long.js is present, ie: the first sample-type. But Speedscope-in-the-browser doesn't seem to include long.js, so our tests were disagreeing with in-browser behavior. With this PR, that should be fixed.
This fixes a number of bugs with callgrind import. Dealing with this file format is a big pain because the documentation on https://www.valgrind.org/docs/manual/cl-format.html doesn't contain enough examples to disambiguate some of the behaviour, and because there's a fundamental impedance mismatch between call-trees and call-graphs.
In any case, after this PR, the behavior of callgrind file import is much better.
The file provided in #414 now imports correctly and, as far as I can tell, displays the same weights as what I see in KCacheGrind.
Some of the key changes:
- Implementing subposition compression. This was just a TODO in the code that was never implemented
- Fixing a misinterpretation of how `fe` and `fi` were intended to be used. Previously, I was using it to change the filename of a symbol, meaning that an `fi` or an `fe` line in the middle of a block describing costs for an `fn` would split a node in the call-graph into multiple nodes causing all manners of problems
- Fixing a bug where `cfn` was persisting beyond a single call, also resulting in call graph nodes being split when they shouldn't be
Fixes#414
The file format uses by Chrome Devtools performance tab periodically changes. It uses the Chrome trace event format (https://docs.google.com/document/d/1CvAClvFfyA5R-PhYUmn5OOQtYMH4h6I0nSsKchNAySU/preview).
This format, however, has two different types: one is `TraceEvent[]`, the other is `{traceEvents: traceEvent[]}`. The importer for non-Chrome devtools profiles already handled this, but the one for Chrome Devtools didn't because Chrome < 114 never used it. It seems like they changed the file format. This PR addresses that change.
Fixes#420
In #385, I introduced a dependency on the `uint8array-json-parser` npm package, but used a fork because of a typescript error. This was resolved in evanw/uint8array-json-parser#1 and published as part of `uint8array-json-parser@0.0.2`. Let's use the upstream.
This also conveniently fixes a new typechecking error that was preventing deployment. The error looked like this:
```
src/import/utils.ts(2,26): error TS2306: File '\''/Users/jlfwong/code/speedscope/node_modules/uint8array-json-parser/uint8array-json-parser.ts'\'' is not a module.'
```
After updating to the upstream, the problem is fixed.
In #297, I re-used the fuzzy matching logic I implemented in #282 for profile selection. Based on feedback from several people in #352, this is surprising behavior.
Upon reflection, this should have been obvious -- I hijacked the Ctrl/Cmd+F browser behaviour, so I should try to replicate the expected behaviour there as closely as possible. Given more patience, I also would've done some user research :)
This PR updates this logic to try to more closely match browser behaviour. This means case-insensitive, exact-substring matching.
I've left the fuzzy matching alone for profile selection since that doesn't attempt to mimic browser behaviour.
The non-fuzzy matching feels slightly odd to me given the filtering behaviour on the sandwich view, but I think consistency across this find UI is important.
Here are the before & after results when searching for the string "ca" in the example profile.
|Before|After|
|-|-|
|<img width="1791" alt="image" src="https://user-images.githubusercontent.com/150329/197232741-6d1d7a8a-8b8c-4a4f-98e3-2c043fd7efd5.png">|<img width="1789" alt="image" src="https://user-images.githubusercontent.com/150329/197232694-82697b68-ca15-49e7-887b-2606646ee5e9.png">|
Fixes#352
Supersedes #403
Unlike the Time Profiler, the CPU Profiler in Instruments use `cycles` for units instead of `ms`:
<img width="872" src="https://user-images.githubusercontent.com/406394/175755999-289cb7c0-f29a-44b1-b00e-b55ef17ee303.png">
Currently Speedscope fails to import the data with the following error in the console:
```
Failed to load format Error: Unrecognized units Gc
```
This PR adds support for `cycles` as a unit to the Instruments deep copy importer as well as `Kc`, `Mc`, and `Gc`, which I'm assuming are increasing in multiples of 1000. Hopefully I've added support for this correctly and this PR is helpful.
This changes the HoverTip placement logic to use measurements from the actual DOM node rather than basing everything on the maximum sizes.
This avoids some counter-intuitive behaviour, most importantly situations where the label would overflow off the left side of the screen for no obvious reason.
Fixes#394Fixes#256
This PR attempts to support stackprof's object mode which tracks the number of allocated objects. This differs from the other modes (cpu and wall) by taking samples every time a Ruby object is allocated using Ruby's [`NEWOBJ` tracepoint](https://github.com/tmm1/stackprof/blob/df24b85953bb45d3abff58d9c82169a3003a60f1/ext/stackprof/stackprof.c#L198-L199).
When importing an object mode profile into speedscope today it still works but what you see is a profile using time units. The profile will only have samples for when an object was allocated which means even if time is reported, the profile is not really meaningful when looking at time.
To address this I've done three things when `mode` is `object`:
+ adjusted the total size of the `StackListProfileBuilder` to use the number of samples (since each sample is one allocation)
+ adjusted the weight of each sample to be `nSamples` (which I believe is always `1` but I'm not positive)
+ do not set the value formatter to a time formatter
Here's what it looks like before and after my changes (note the units and weight of samples):
wall (before) | object (before) | object (after)
-- | -- | --
<img width="1624" alt="Screen Shot 2022-05-11 at 4 51 31 PM" src="https://user-images.githubusercontent.com/898172/167945635-2401ca73-4de7-4559-b884-cf8947ca9738.png"> | <img width="1624" alt="Screen Shot 2022-05-11 at 4 51 34 PM" src="https://user-images.githubusercontent.com/898172/167945641-ef302a60-730b-4afd-8e44-5f02e54b3cb7.png"> | <img width="1624" alt="Screen Shot 2022-05-11 at 4 51 42 PM" src="https://user-images.githubusercontent.com/898172/167945643-5611b267-f8b2-4227-a2bf-7145c4030aa2.png">
<details>
<summary>Test code</summary>
```ruby
require 'stackprof'
require 'json'
def do_test
5.times do
make_a_word
end
end
def make_a_word
('a'..'z').to_a.shuffle.map(&:upcase).join
end
StackProf.start(mode: :object, interval: 1, raw: true)
do_test
StackProf.stop
File.write('tmp/object_profile.json', JSON.generate(StackProf.results))
StackProf.start(mode: :wall, interval: 1, raw: true)
do_test
StackProf.stop
File.write('tmp/wall_profile.json', JSON.generate(StackProf.results))
```
</details>
Fixes#312
This turns out not to be very deep: you have to pass an optional second parameter to the [`URL` constructor](https://developer.mozilla.org/en-US/docs/Web/API/URL/URL) to resolve relative URLs.
```
> new URL('/path/to/file#hashcode').pathnaem
VM252:1 Uncaught TypeError: Failed to construct 'URL': Invalid URL
at <anonymous>:1:1
(anonymous) @ VM252:1
> new URL('/path/to/file#hashcode', 'http://example.com/').pathname
"/path/to/file"
```
Browsers have a limit on how big you can make strings. In Chrome on a 64 bit machine, this is around 512MB, which explains why in #340, a 600MB file fails to load.
To work around this issue, we avoid making strings this large.
To do so, we need two core changes:
1. Instead of sending large strings as the import mechanism to different file format importers, we introduce a new `TextFileContent` interface which exposes methods to get the lines in the file or the JSON representation. In the case of line splitting, we assume that no single line exceeds the 512MB limit.
2. We introduce a dependency on https://github.com/evanw/uint8array-json-parser to allow us to parse JSON files contained in `Uint8Array` objects
To ensure that this code doesn't code rot without introducing 600MB test files or test file generation into the repository, we also re-run a small set of tests with a mocked maximum string size of 100 bytes. You can see that the chunked string representation code is getting executed via test coverage.
Fixes#340
Ingest files containing collapsed stacks and tolerate invalid lines,
like FlameGraph does.
Some files might contain lines starting with a # to add comments to the
collected samples. Speedscope should still attempt to parse these files
as collapsed stacks and only keep the samples that it can find. Only
fail if there are no samples reported.
This is an experiment in replacing redux entirely with a tiny library I wrote for global application state management.
Redux has been okay, but all of the redux actions in speedscope are setters, which always made me think there must be a simpler way. This is an attempt to find that simpler way.
See `src/lib/atom.ts` for the library.
Implements import from the [callgrind format](https://www.valgrind.org/docs/manual/cl-format.html).
This comes with a big caveat that the call graph information contained with callgrind formatted files don't uniquely define a flamegraph, so the generated flamegraph is a best-effort guess. Here's the comment from the top of the main file for the callgrind importer with an examplataion:
```
// https://www.valgrind.org/docs/manual/cl-format.html
//
// Larger example files can be found by searching on github:
// https://github.com/search?q=cfn%3D&type=code
//
// Converting callgrind files into flamegraphs is challenging because callgrind
// formatted profiles contain call graphs with weighted nodes and edges, and
// such a weighted call graph does not uniquely define a flamegraph.
//
// Consider a program that looks like this:
//
// // example.js
// function backup(read) {
// if (read) {
// read()
// } else {
// write()
// }
// }
//
// function start() {
// backup(true)
// }
//
// function end() {
// backup(false)
// }
//
// start()
// end()
//
// Profiling this program might result in a profile that looks like the
// following flame graph defined in Brendan Gregg's plaintext format:
//
// start;backup;read 4
// end;backup;write 4
//
// When we convert this execution into a call-graph, we get the following:
//
// +------------------+ +---------------+
// | start (self: 0) | | end (self: 0) |
// +------------------+ +---------------|
// \ /
// (total: 4) \ / (total: 4)
// v v
// +------------------+
// | backup (self: 0) |
// +------------------+
// / \
// (total: 4) / \ (total: 4)
// v v
// +----------------+ +-----------------+
// | read (self: 4) | | write (self: 4) |
// +----------------+ +-----------------+
//
// In the process of the conversion, we've lost information about the ratio of
// time spent in read v.s. write in the start call v.s. the end call. The
// following flame graph would yield the exact same call-graph, and therefore
// the exact sample call-grind formatted profile:
//
// start;backup;read 3
// start;backup;write 1
// end;backup;read 1
// end;backup;write 3
//
// This is unfortunate, since it means we can't produce a flamegraph that isn't
// potentially lying about the what the actual execution behavior was. To
// produce a flamegraph at all from the call graph representation, we have to
// decide how much weight each sub-call should have. Given that we know the
// total weight of each node, we'll make the incorrect assumption that every
// invocation of a function will have the average distribution of costs among
// the sub-function invocations. In the example given, this means we assume that
// every invocation of backup() is assumed to spend half its time in read() and
// half its time in write().
//
// So the flamegraph we'll produce from the given call-graph will actually be:
//
// start;backup;read 2
// start;backup;write 2
// end;backup;read 2
// end;backup;write 2
//
// A particularly bad consequence is that the resulting flamegraph will suggest
// that there was at some point a call stack that looked like
// strat;backup;write, even though that never happened in the real program
// execution.
```
Fixes#18
The trace event format has a very unfortunate combination of requirements in order to give a best-effort interpretation of a given trace file:
1. Events may be recorded out-of-order by timestamp
2. Events with the *same* timestamp should be processed in the order they were provided in the file. Mostly.
The first requirement is written explicitly [in the spec](https://docs.google.com/document/d/1CvAClvFfyA5R-PhYUmn5OOQtYMH4h6I0nSsKchNAySU/preview).
> The events do not have to be in timestamp-sorted order.
The second one isn't explicitly written, but it's implicitly true because otherwise the interpretation of a file is ambiguous. For example, the following file has all events with the same `ts` field, but re-ordering the fields changes the interpretation.
```
[
{ "pid": 0, "tid": 0, "ph": "X", "ts": 0, "dur": 20, "name": "alpha" },
{ "pid": 0, "tid": 0, "ph": "X", "ts": 0, "dur": 20, "name": "beta" }
}
```
If we allowed arbitrary reordering, it would be ambiguous whether the alpha frame should be nested inside of the beta frame or vice versa. Since traces are interpreted as call trees, it's not okay to just arbitrarily choose.
So you might next guess that a reasonable approach would be to do a [stable sort](https://wiki.c2.com/?StableSort) by "ts", then process the events one-by-one. This almost works, except for two additional problems. The first problem is that in some situations this would still yield invalid results.
```
[
{"pid": 0, "tid": 0, "ph": "B", "name": "alpha", "ts": 0},
{"pid": 0, "tid": 0, "ph": "B", "name": "beta", "ts": 0},
{"pid": 0, "tid": 0, "ph": "E", "name": "alpha", "ts": 1},
{"pid": 0, "tid": 0, "ph": "E", "name": "beta", "ts": 1}
]
```
If we were to follow this rule, we would try to execute the `"E"` for alpha before the `"E"` for beta, even though beta is on the top of the stack. So in *that* case, we actually need to execute the `"E"` for beta first, otherwise the resulting profile is incorrect.
The other problem with this approach of using the stable sort order is the question of how to deal with `"X"` events. speedscope translates `"X"` events into a `"B"` and `"E"` event pair. But where should it put the `"E"` event? Your first guess might be "at the index where the `"X"` events occur in the file". This runs into trouble in cases like this:
```
[
{ "pid": 0, "tid": 0, "ph": "X", "ts": 9, "dur": 1, "name": "beta" },
{ "pid": 0, "tid": 0, "ph": "X", "ts": 9, "dur": 2, "name": "gamma" },
]
```
The most natural translation of this would be to convert it into the following `"B"` and `"E"` events:
```
[
{ "pid": 0, "tid": 0, "ph": "B", "ts": 9, "name": "beta" },
{ "pid": 0, "tid": 0, "ph": "E", "ts": 10, "name": "beta" },
{ "pid": 0, "tid": 0, "ph": "B", "ts": 9, "name": "gamma" },
{ "pid": 0, "tid": 0, "ph": "E", "ts": 11, "name": "gamma" },
]
```
Which, after a stable sort turns into this:
```
[
{ "pid": 0, "tid": 0, "ph": "B", "ts": 9, "name": "beta" },
{ "pid": 0, "tid": 0, "ph": "B", "ts": 9, "name": "gamma" },
{ "pid": 0, "tid": 0, "ph": "E", "ts": 10, "name": "beta" },
{ "pid": 0, "tid": 0, "ph": "E", "ts": 11, "name": "gamma" },
]
```
Notice that we again have a problem where we open "beta" before "gamma", but we need to close "beta" first because it ends first!
Ultimately, I couldn't figure out any sort order that would allow me to predict ahead-of-time what order to process the events in. So instead, I create two event queues: one for `"B"` events, and one for `"E"` events, and then try to be clever about how I merge them together.
AFAICT, chrome://tracing does not sort events before processing them, which is kind of baffling. But chrome://tracing also has really bizarre behaviour for things like this where the resulting flamegraph isn't even a valid tree (there are overlapping ranges):
```
[
{ "pid": 0, "tid": 0, "ph": "X", "ts": 0, "dur": 10, "name": "alpha" },
{ "pid": 0, "tid": 0, "ph": "X", "ts": 5, "dur": 10, "name": "beta" }
}
```
So I'm going to call this "good enough" for now.
Fixes#223Fixes#320
In #273, I changed `CallTreeProfileBuilder.leaveFrame` to fail hard when you request to leave a frame different from the one at the top of the stack. It turns out we were intentionally doing this for trace event imports, because `args` are part of the frame key, and we want to allow profiles to be imported where the `"B"` and `"E"` events have differing `args` field.
This PR fixes the import code to permissively allow the `"args"` field to not match between the `"B"` and `"E"` fields.
**A note on intentional differences between speedscope and chrome://tracing**
`chrome://tracing` will close whichever frame is at the top when it gets an `"E"` event, regardless of whether the name or the args match. speedscope will ignore the event entirely if the `"name"` field doesn't match, but will warn but still close the frame if the `"name"`s match but the `"args"` don't.
```
[
{"pid": 0, "tid": 0, "ph": "B", "name": "alpha", "ts": 0},
{"pid": 0, "tid": 0, "ph": "B", "name": "beta", "ts": 1},
{"pid": 0, "tid": 0, "ph": "E", "name": "gamma", "ts": 2},
{"pid": 0, "tid": 0, "ph": "E", "name": "beta", "ts": 9},
{"pid": 0, "tid": 0, "ph": "E", "name": "alpha", "ts": 10}
]
```
### speedscope
```
warning: ts=2: Request to end "gamma" when "beta" was on the top of the stack. Doing nothing instead.
```
### chrome://tracing
This PR adds the ability to remap an already-loaded profile using a JavaScript source map. This is useful for e.g. recording minified profiles in production, and then remapping their symbols when the source map isn't made directly available to the browser in production.
This is a bit of a hidden feature. The way it works is to drop a profile into speedscope, then drop the sourcemap file on top of it.
To test this, I used a small project @cricklet made (https://gist.github.com/cricklet/0deaaa7dd63657adb6818f0a52362651), and also tested against speedscope itself.
To test against speedscope itself, I profiled loading a file in speedscope in Chrome, then dropped the resulting Chrome timeline profile into speedscope, and dropped speedscope's own sourcemap on top. Before dropping the source map, the symbols look like this:
After dropping the source map, they look like this:
I also added automated tests using a small JS bundle constructed with various different JS bundlers to make sure it was doing a sensible thing in each case.
# Background
Remapping symbols in profiles using source-maps proved to be more complex than I originally thought because of an idiosyncrasy of which line & column are referenced for stack frames in browsers. Rather than the line & column referencing the first character of the symbol, they instead reference the opening paren for the function definition.
Here's an example file where it's not immediately apparent which line & column is going to be referenced by each stack frame:
```
class Kludge {
constructor() {
alpha()
}
zap() {
alpha()
}
}
function alpha() {
for (let i = 0; i < 1000; i++) {
beta()
delta()
}
}
function beta() {
for (let i = 0; i < 10; i++) {
gamma()
}
}
const delta = function () {
for (let i = 0; i < 10; i++) {
gamma()
}
}
const gamma =
() => {
let prod = 1
for (let i = 1; i < 1000; i++) {
prod *= i
}
return prod
}
const k = new Kludge()
k.zap()
```
The resulting profile looks like this:
The relevant line & column for each function are...
```
// Kludge: line 2, column 14
class Kludge {
constructor() {
^
...
// zap: line 6, column 6
zap() {
^
...
// alpha: line 11, column 15
function alpha() {
^
...
// delta: line 24, column 24
const delta = function () {
^
...
// gamma: line 31, column 1
const gamma =
() => {
^
```
If we look up the source map entry that corresponds to the opening paren, we'll nearly always get nothing. Instead, we'll look at the entry *preceding* the one which contains the opening paren, and hope that has our symbol name. It seems this works at least some of the time.
Another complication is that some, but not all source maps include the original names of functions. For ones that don't, but do include the original source-code, we try to deduce it ourselves with varying amounts of success.
Supersedes #306Fixes#139
The Austin format conversion tools have been moved to the dedicated austin-python module. The README has been updated to point to the new instructions.
Before this PR, we blindly assumed that all text imported into speedscope was UTF-8 encoded. This, unsurprisingly, is not always true. After this PR, we support text that's UTF-16 encoded, with either the little-endian or big-endian byte-order-mark.
Fixed#291
Closes#294
This adds import for Safari/webkit profiler. Well, for Safari 13.1 for sure, I haven't done any work to check if there's been changes to the syntax.
It seems to work OK, and is already a huge improvement over profiling in Safari (which doesn't even have a flame graph, let alone something like left heavy). Sadly, the sampler resolution is only 1kHz, which is not super useful for a lot of profiling work. I made a ticket on webkit bug tracker to ask for 10kHz/configurable sampling rate: https://bugs.webkit.org/show_bug.cgi?id=214866
Another thing that's missing is that I cut out all the idle time. We could also insert layout/paint samples into the timeline by parsing `events`. But I'll leave that for another time.
<img width="1280" alt="Captura de pantalla 2020-07-28 a las 11 02 06" src="https://user-images.githubusercontent.com/183747/88643560-20c16700-d0c2-11ea-9c73-d9159e68fab9.png">
## Context
Hi! I'm working on an experimental React [concurrent mode profiler](https://react-scheduling-profiler.vercel.app) in partnership with the React core team, and we're using a [custom build of Speedscope](https://github.com/taneliang/speedscope/compare/master...taneliang:fork-for-scheduling-profiler) that exposes Speedscope's internals to support our custom flamechart rendering. Specifically, Speedscope is used to import and process Chrome profiles, which are then fed to our rendering code that draws everything to a canvas.
Here's a screenshot of our app for context. The stuff above the thick gray bar is React data (some React Fiber lanes, React events, and other user timing marks), and a flamechart is drawn below.
## Problem
Early on, we had [an issue](https://github.com/MLH-Fellowship/scheduling-profiler-prototype/issues/42) where our flamechart was not aligned with the React data. The discrepancy between the flamechart frames and our React data grew over the time of the profile.
We tracked down the cause to https://github.com/jlfwong/speedscope/pull/80, which resolves https://github.com/jlfwong/speedscope/issues/70. It seems like zeroing out those negative time deltas resulted in the accumulation of errors over the time of these profiles, which resulted in the very visible misalignment in our profiler.
I am confident that the React data's timestamps are correct because they are obtained from User Timing marks, which have absolute timestamps and are thus independent of any `timeDelta` stuff. This would mean that Speedscope is likely displaying incorrect timestamps for Chrome profiles.
## Solution
This PR takes a different approach to solving the negative `timeDelta` problem: we add a `lastElapsed` variable as a sort of backstop, preventing `elapsed` from traveling backwards in time, while still ensuring that `elapsed` is always accurate.
We've been using this patch in our custom build for about a month now and it seems to work well.
This implements the next step towards full featured search in speedscope: visual highlighting of matching search results in the time ordered & left heavy views. This doesn't yet add the ability to click prev/next to select the next matching element in the editor, but I'm still planning on doing something like that. I haven't figured out yet what I want the user experience to be like for that.
This works towards fixing #38
This fixes two unrelated problems which together caused performance issues in the sandwich view & made hover tooltips appear to be broken.
The first issue was caused by continuously priming the `requestAnimationFrame` loop when it should be a no-op, and the second issue was caused by using different cache keys when trying to access a memoized value in the caller & callee flamegraph components. This resulted in thrash, and especially bad performance because the cache miss was resulting in us re-allocating the WebGL framebuffer on every frame, which is unsurprisingly quite slow.
Fixes#212Fixes#155Fixes#74 (though this was maybe already fixed)
This is the first step towards fixing #38.
I started with the easiest part from a UI-paradigm perspective, and also the place that's the most confusing that search doesn't work. Before this PR, browers' Cmd+F/Ctrl+F would *look* like it worked in the Sandwich view, but they wouldn't work fully because the view in the sandwich view is a virtualized table, meaning that it doesn't put all of the rows in the DOM. Instead, it only renders enough to fill the viewport to make rendering much faster.
Here's what the changes from this PR look like in action:
Before closing #38, I'll be adding search functionality to the flamechart views too.
This adds much better UI for selecting different profiles within a single import.
You can now hover over the middle of the toolbar or hit `t` on your keyboard to bring up the profile selector. From there, you can use fuzzy-find to switch to the profile you want, and hit "enter" to select it. The up and down arrow keys can be used while the profile selector filter input is focused to move through the list of profiles.
I think the "next" and "prev" buttons are now totally useless, so I removed them.
Fixes#167
Profile switching was subtly broken because action creators weren't being correctly re-bound due to a missing dependency in a `useCallback` call.
I also tried to reduce boilerplate in this PR by adding additional exhaustive deps protection via eslint for `useSelector`, `useAppSelector`, and `useActionCreator`. The removes the need for using `useCallback` or each of those.
Fixes#280
To test this, load a profile, then save a `.tsx` file locally. Before this change, it would bring you back to the welcome screen after hot reload. After this change, application state is still displayed. This is because before the change, the `setGLCanvas` action wasn't resulting in a re-render because it occurred between the initial render and the `useLayoutEffect` callback.
Fixes#276
I'd like to try writing new components using hooks, and to do that I need to upgrade from preact 8 to preact X.
For reasons that are... complicated, in order to upgrade without breaking part of my build process, I had to remove the dependency on `preact-redux` altogether. This led me to write my own implementation, and as part of that I realized I could remove `createContainer` in favour of some simple hooks that use redux.
Before landing:
- [x] Investigate performance issues in the sandwich views
- [x] Investigate es-lint checks for exhaustive hook dependencies
Fixes#268
I fixed it by dropping the dependency on quicktype entirely, and using its dependency directly. I still don't understand why the version of typescript used in this repository affects what quicktype is doing, but it seems like the issue is in quicktype, not its dependency.
I validated this change was correct by diffing the output of `node scripts/generate-file-format-schema-json.js` with what's currently on http://speedscope.app/file-format-schema.json. There's no difference.
This PR also includes changes to the CI script to ensure that we can catch this before hitting master next time.
@JustinBeckwith pointed out in #262 that `npm install` was broken in node 13.x, and @DanielRuf pointed in #254 that test fail for node 11+ because of a change to stability of sorting.
This PR seeks to address both of those.
The installation issue was fixed by just regenerating `package-lock.json` without needing to bump any of the direct dependency versions. The test failure issue requires manual intervention.
To fix the sort stability issue, I updated the tests to use the stable sort values (these were all the correct values, though some of the test values were incorrect).
To make the suite still pass for node 10, I added a hack where I override `Array.prototype.sort` with a stable implementation that's *only* used in tests (See comments in code for a justification for why)
## Test Plan
Before this PR: `npm install` on node 13.x fails & `npm run jest` results in test failures
After this PR: `npm install` on node 13.x passes & `npm run jest` passes for node 10, 12, and 13.
I ended up in a horrible peer dependency hell and apparently needed to bump the versions of quicktype, typescript, ts-jest, *and* jest to get out of it. But I think I got out of it!
Local builds and deployment builds both seem to work after these changes.
The code to import trace formatted events intentionally re-orders events in order to make it easier at flamegraph construction time to order the pushes and pops of frames.
It turns out that this re-ordering results in incorrect flamegraphs being generated as shown in #251.
This PR fixes this by avoiding re-ordering in situations where it isn't necessary.
Apparently Emscripten now generates `.symbols` files where names are not mangled using Clang's mangling scheme, but rather hex-escaped! So 'a\20b' means 'a b'. Currently we can't import these symbol maps into Speedscope because a regex rejects them, and they look weird because we don't unescape.
In #194, I added code to support import of multithreaded profiles from Chrome 70. I'm now doing some profiling work on an older version of Android chrome, and it seems like the profile objects don't yet have `id` properties. Instead, we should try using the `pid/tid` pair to identify profiles when the `id` field is absent.
This was tested against a profile import from Android Chrome 66.
this's will lack `com.apple.xray.owner.template` in instruments archive data where run instruments with command line.
like:
1. run`instruments -t Template.tracetemplate -D demo.trace -l 10000 -w test.app`
2. drag `demo.trace` into `https://www.speedscope.app`
3. alert `Unrecognized format! See documentation about supported formats`
The spec for the Trace Event Format technically requires that all entries have "ts" values, and they do in the profiles recorded using chrome://tracing. We don't actually use those values in the case of "M" (metadata) events, however, and they're semantically meaningless as far as I can tell, so let's stop requiring them.
This allows the files that @aras-p provided in #77 to import successfully.
Fixes#77
This PR implements basic import of profiles from the "Trace Event Format", which is used by `chrome://tracing`, but also which many other tools target as a convenient event tracing format. The spec can be found here: https://docs.google.com/document/d/1CvAClvFfyA5R-PhYUmn5OOQtYMH4h6I0nSsKchNAySU/preview#heading=h.xqopa5m0e28f.
The standard supports a broad set of events, some of which don't yet have any practical way to visualize them in speedscope. This PR implements support for the `B`, `E`, and `X` events, as well as gathering process and thread names via some of the `M` events.
This work was motivated by a generous donation to /dev/color by @aras-p: https://github.com/jlfwong/speedscope/issues/77#issuecomment-455077014Fixes#77
In #160, I wrote code which incorrectly assumed that at most one profile would be active at a time. It turns out this assumption is incorrect because of webworkers! This PR introduces a fix which correctly separates samples taken on the main thread from samples taken on worker threads, and allows viewing both in speedscope.
Fixes#171
#165 introduced a performance regression by using a really inefficient method for converting from array buffers into string. This should ix it by using `TextDecoder` instead.
Fixes#182 by adding support for importing the JSON profiling format created by GHC's built in profiling support when the executable is passed the `-pj` option. Produces a profile group containing both a time and allocation profile.
Unfortunately, GHC doesn't provide the raw sample information to get the time view to be useful, so only left heavy and sandwich are useful.
Includes a test profile, and I've also tested it on a more real large 2MB profile file in the UI and it works great.
I also modified the Readme to link to a wiki page I'm unable to create, but that should have something like this content copy-pasted into it:
# Importing from Haskell
GHC provides built in profiling support that can export a JSON file.
In order to do this you need to compile your executable with profiling
support and then pass the `-pj` RTS flag to the executable.
This will produce a `my-binary.prof` file in the current directory which
you can import into speedscope.
## Using GHC
See the [GHC manual page on profiling](https://downloads.haskell.org/~ghc/latest/docs/html/users_guide/profiling.html)
for more extensive information on the command line flags available.
```
$ ghc -prof -fprof-auto -rtsopts Main.hs
$ ./Main +RTS -pj -RTS
```
## Using Stack
### With executables
```
$ stack build --profile
$ stack exec -- my-executable +RTS -pj -RTS
```
### With tests
```
stack test --profile --test-arguments "+RTS -pj -RTS"
```
When using #profileURL, some binary characters cannot be read if we use `fetch text`. So I changed that to use `arrayBuffer`.
Now we can read pprof protobuf files and normal JSON files instead of only text files.
This PR adds support for importing from Google's pprof format, which is a gzipped, protobuf encoded file format (that's incredibly well documented!) The [pprof http library](https://golang.org/pkg/net/http/pprof/) also offers an output of the trace file format, which continues to not be supported in speedscope to date (See #77). This will allow importing of profiles generated by the standard library go profiler for analysis of profiles containing heap allocation information, CPU profile information, and a few other things like coroutine creation information.
In order to add support for that a number of dependent bits of functionality were added, which should each provide an easier path for future binary input sources
- A protobuf decoding library was included ([protobufjs](https://www.npmjs.com/package/protobufjs)) which includes both a protobuf parser generator based on a .proto file & TypeScript definition generation from the resulting generated JavaScript file
- More generic binary file import. Before this PR, all supported sources were plaintext, with the exception of Instruments 10 support, which takes a totally different codepath. Now binary file import should work when files are dropped, opened via file browsing, or opened via invocation of the speedscope CLI.
- Transparent gzip decoding of imported files (this means that if you were to gzip compress another JSON file, then importing it should still work fine)
Fixes#60.
--
This is a [donation motivated](https://github.com/jlfwong/speedscope/issues/60#issuecomment-419660710) PR motivated by donations by @davecheney & @jmoiron to [/dev/color](https://www.devcolor.org/welcome) 🎉
It seems like #160 accidentally broken import of profiles in some circumstances from Chrome < 69. Before #160, we always took the first profile in the list *but* the profiles were not sorted chronologically. After #160 but before this PR, we were taking the chronologically first.
After this PR, we always take the chronologically last `CpuProfile` event in the trace.
This PR fixes#159, and also fixes various small things about how profiles were imported for previous versions of Chrome & for Firefox.
The Chrome 69 format splits profiles across several [Trace Event Format](https://docs.google.com/document/d/1CvAClvFfyA5R-PhYUmn5OOQtYMH4h6I0nSsKchNAySU/preview) events. There are two relevant events: "Profile" and "ProfileChunk". At first read through a profile, it seems like profiles are incorrectly terminated, but it seems like the cause of that is that, for whatever reason, events in the event log are not always sorted in chronological order. If sorted chronologically, then the event sequence can be parsed sensibly.
In the process of looking at this information, I also discovered that speedscope's chrome importer was incorrectly interpreting the value of the first element in `timeDeltas` array. It's intended to be the elapsed time since the start of the profile, not the time between the first pair of samples. This changes the weight attributed to the first sample.
Looks like Firefox also generates locations with names like
`bound (self-hosted:951:0)`. We check for `self-hosted`, but not for
`self-hosted` with stuff after it following a colon. We should ignore
these too, otherwise we can end up with stuff on our stack that we don't
expect. This was causing Firefox profiles not to load because we
completed building the profile with a non-empty stack.
Attached is a profile that errors without this patch and successfully renders
with this patch.
[copy.json.zip](https://github.com/jlfwong/speedscope/files/2350583/copy.json.zip)
- Add support for Instruments 16 Time Profile Deep Copy [[#484](https://github.com/jlfwong/speedscope/pull/484)] (by @robert3005)
- Fix bug where import after error continues failing [[#463](https://github.com/jlfwong/speedscope/pull/463)] (by @tom93)
- Bundle the font [[#472](https://github.com/jlfwong/speedscope/pull/472)] (by @Krinkle)
- Clarify specification of startValue in speedscope file format [[#464](https://github.com/jlfwong/speedscope/pull/464)] (by @tom93)
## [1.20.0] - 2024-01-12
- Partition based on samples instead of traceEvents when importing a sample-based chrome trace [[#460](https://github.com/jlfwong/speedscope/pull/460)] (by @zacharyfmarion)
## [1.19.0] - 2023-12-27
- Improve hermes profile frame keys to better group frames [[#459](https://github.com/jlfwong/speedscope/pull/459)] (by @zacharyfmarion)
- Update README.md
## [1.18.0] - 2023-12-26
- Add hermes-specific support for the trace event format [[#458](https://github.com/jlfwong/speedscope/pull/458)] (by @zacharyfmarion)
- Update README-ADMINS.md with npm login instructions [[#457](https://github.com/jlfwong/speedscope/pull/457)] (by @jlfwong)
- Fix import from Chrome Devtools performance tab in Chrome >= 114 [[#422](https://github.com/jlfwong/speedscope/pull/422)]
- Callgrind: Subposition compression and weight correction [[#423](https://github.com/jlfwong/speedscope/pull/423)]
## [1.15.0] - 2022-10-22
### Fixed
- Replace fuzzy matching with exact substring matching for finding matching frames [[#407](https://github.com/jlfwong/speedscope/pull/407)]
## [1.14.0] - 2022-05-19
### Added
- File and line information is now displayed in hover tips [[#365](https://github.com/jlfwong/speedscope/pull/365)] (by [@sokra](https://github.com/sokra))
- Support for stackprof object mode [[#391](https://github.com/jlfwong/speedscope/pull/391)] (by [@alexcoco](https://github.com/alexcoco))
- Support for hash params to control view-mode [[#362](https://github.com/jlfwong/speedscope/pull/362)] (by [@djudd](https://github.com/djudd))
- Support for profiles over 512MB now works [[#385](https://github.com/jlfwong/speedscope/pull/385)] (by [@jlfwong](https://github.com/jlfwong))
- Support for relative URLs in profileURL hashParam [[#357](https://github.com/jlfwong/speedscope/pull/357)] (by [@danvk](https://github.com/danvk))
### Fixed
- Allow collapsed stacks with invalid lines for the Brenden Gregg stack format [[#336](https://github.com/jlfwong/speedscope/pull/336)] (by [@P403n1x87](https://github.com/P403n1x87))
- Allow pasting into the search box [[#338](https://github.com/jlfwong/speedscope/pull/338)] (by [@P403n1x87](https://github.com/P403n1x87))
- Support for importing callgrind profiles [[#331](https://github.com/jlfwong/speedscope/pull/331)]
## [1.12.1] - 2020-11-12
### Fixed
- Fixed for retina displays [[#327](https://github.com/jlfwong/speedscope/issues/327)]
## [1.12.0] - 2020-11-12
### Added
- Dark mode! [[#323](https://github.com/jlfwong/speedscope/pull/323)]
### Fixed
- Fixed incorrect highlighting when search result overlaps "…" [[#326](https://github.com/jlfwong/speedscope/pull/326)]
## [1.11.1] - 2020-10-25
### Fixed
- Fix trace-event import for many cases where there are 'ts' collisions [[#322](https://github.com/jlfwong/speedscope/pull/322)]
- Fix import of trace event files where B/E events' args don't match [[#321](https://github.com/jlfwong/speedscope/pull/321)]
## [1.11.0] - 2020-10-13
### Added
- Support remapping profiles using source maps [[#317](https://github.com/jlfwong/speedscope/pull/317)]
### Fixed
- Fix line & column numbers in imports from Chrome & Firefox [[#318](https://github.com/jlfwong/speedscope/pull/318)]
## [1.10.0] - 2020-09-29
### Added
- Support for importing profiles from Safari [[#300](https://github.com/jlfwong/speedscope/pull/300)] (by [@radex](https://github.com/radex))
### Fixed
- Fixed browser not opening on Windows when using the CLI [[#307](https://github.com/jlfwong/speedscope/pull/307)] (by [@spillerrec](https://github.com/spillerrec))
- Fixed import of UTF-16 encoded files w/ BOM [[#314](https://github.com/jlfwong/speedscope/pull/314)]
- Removed accidental dependency on React [[#315](https://github.com/jlfwong/speedscope/pull/315)]
## [1.9.0] - 2020-08-05
### Added
- Provide prev/next buttons to cycle through search results, make search results more visually prominen [[#304](https://github.com/jlfwong/speedscope/pull/304)]
### Fixed
- Fix accumulated errors in Chrome profile imports caused by zeroed negative timeDeltas [[#305](https://github.com/jlfwong/speedscope/pull/305)] (by [@taneliang](https://github.com/taneliang))
## [1.8.0] - 2020-07-19
### Added
- Added search highlighting in time order & left heavy views [[#297](https://github.com/jlfwong/speedscope/pull/297)]
### Fixed
- Fix performance issues for the caller/callee flamegraphs in the sandwich view [[#296](https://github.com/jlfwong/speedscope/pull/296)]
## [1.7.0] - 2020-07-13
### Added
- Introduced filtering via Ctrl+F/Cmd+F into the sandwich view [[#293](https://github.com/jlfwong/speedscope/pull/293)]
- Crash instead of incorrectly interpreting profiles with incorrectly ordered events [[#273](https://github.com/jlfwong/speedscope/pull/273)]
- A large refactor to upgrade to Preact X was performed [[#267](https://github.com/jlfwong/speedscope/pull/267)]
## [1.5.3] - 2020-01-16
### Fixed
- Bump dependency versions to unbreak build [[#253](https://github.com/jlfwong/speedscope/pull/253)] (by [@jlfwong](https://github.com/jlfwong), with changes from [@Archerlly](https://github.com/Archerlly)'s [#215](https://github.com/jlfwong/speedscope/pull/215))
- Trace event: Prevent event re-ordering from generating incorrect flamegraphs ([#252](https://github.com/jlfwong/speedscope/pull/252), with changes from [@hwajaywang](https://github.com/hwajaywang)'s [#249](https://github.com/jlfwong/speedscope/pull/249))
- Make tooltip width wider [[#239](https://github.com/jlfwong/speedscope/pull/239)] (by [@miso11](https://github.com/miso11))
## [1.5.2] - 2019-10-10
### Fixed
- Fix emscripten remapping when symbols are hex-escaped, like `a\20b` [[#233](https://github.com/jlfwong/speedscope/pull/233)] (by [@jyc](https://github.com/jyc))
## [1.5.1] - 2019-06-06
### Fixed
- Fixed import of trace event files which contain unmatched "E" events ([#222](https://github.com/jlfwong/speedscope/pull/222)) (by [@jlfwong](https://github.com/jlfwong))
## [1.5.0] - 2019-02-17
### Added
- Support importing unterminated JSON in simple cases ([#208](https://github.com/jlfwong/speedscope/pull/208)) (by [@jlfwong](https://github.com/jlfwong))
### Fixed
- Fix crash when importing from stackprof without raw_timestamp_deltas ([#207](https://github.com/jlfwong/speedscope/pull/207)) (by [@jlfwong](https://github.com/jlfwong))
- Alert instead of crash when importing a file containing no profiles ([#205](https://github.com/jlfwong/speedscope/pull/205)) (by [@jlfwong](https://github.com/jlfwong))
- Fixed import of multithreaded profiles from Chrome 66 ([#206](https://github.com/jlfwong/speedscope/pull/206)) (by [@jlfwong](https://github.com/jlfwong))
- Fixed import of instruments trace files with missing run number ([#203](https://github.com/jlfwong/speedscope/pull/203)) (by [@Archerlly](https://github.com/Archerlly))
## [1.4.1] - 2019-01-22
### Fixed
- Fix importing of Trace Event Format files with no ts field on M events [[#198](https://github.com/jlfwong/speedscope/pull/198)] (by [@jlfwong](https://github.com/jlfwong))
## [1.4.0] - 2019-01-22
### Added
- Import v8 cpu profile (old format) [[#177](https://github.com/jlfwong/speedscope/pull/177)] (by [@vmarchaud](https://github.com/vmarchaud))
- Fixed import of multithreaded Chrome profiles [[#19](https://github.com/jlfwong/speedscope/pull/19)] (by [@jlfwong](https://github.com/jlfwong))
## [1.3.1] - 2018-11-08
### Fixed
- Fixed a file import performance regression by using TextDecoder [[#188](https://github.com/jlfwong/speedscope/pull/188)] (by [@jlfwong](https://github.com/jlfwong))
## [1.3.0] - 2018-10-29
### Added
- Support import from Haskell GHC JSON format support [[#183](https://github.com/jlfwong/speedscope/pull/183)] (by [@trishume](https://github.com/trishume))
### Fixed
- Make the wasd keymappings work on azerty keyboards [[#184](https://github.com/jlfwong/speedscope/pull/184)] (by [@vrischmann](https://github.com/vrischmann))
- Fix import of binary formats via profileURL [[#179](https://github.com/jlfwong/speedscope/pull/179)] (by [@f](https://github.com/f)-hj)
- Add go tool pprof import support [[#165](https://github.com/jlfwong/speedscope/pull/165)]
## [1.0.4] - 2018-09-12
### Fixed
- Fix import from Chrome < 69 when there are multiple profiles [[#161](https://github.com/jlfwong/speedscope/pull/161)]
## [1.0.3] - 2018-09-10
### Fixed
- Fix import for Chrome 69, support leading idle time before first call [[#160](https://github.com/jlfwong/speedscope/pull/160)]
## [1.0.2] - 2018-09-04
### Fixed
- Allow optional CR before LF when probing collapsed stacks files [[#154](https://github.com/jlfwong/speedscope/pull/154)]
- Fix import for Firefox 63 [[#156](https://github.com/jlfwong/speedscope/pull/156)]
- Change time formatting for minutes from 1.50min to 1:30 [[#153](https://github.com/jlfwong/speedscope/pull/153)] (by [@Alex](https://github.com/Alex)-Diez)
## [1.0.1] - 2018-08-23
* Fixed an issue where flamegraph bounds were not always being cleared correctly, leading to visual artifacts [#150]
- Fixed an issue where flamegraph bounds were not always being cleared correctly, leading to visual artifacts [[#150](https://github.com/jlfwong/speedscope/pull/150)]
## [1.0.0] - 2018-08-23
### Fixed
* Fixed rendering issues when switching between screens w/ different `devicePixelRatios` [#147]
- Fixed rendering issues when switching between screens w/ different `devicePixelRatios` [[#147](https://github.com/jlfwong/speedscope/pull/147)]
## [0.7.1] - 2018-08-20
### Fixed
* Removed dependency on regl in order to allow speedscope to run in strict content-security-policy environments [#140]
* Fixed text culling bug [#143]
- Removed dependency on regl in order to allow speedscope to run in strict content-security-policy environments [[#140](https://github.com/jlfwong/speedscope/pull/140)]
- Fixed text culling bug [[#143](https://github.com/jlfwong/speedscope/pull/143)]
## [0.7.0] - 2018-08-16
### Added
* Added support to import from linux `perf script` [#135]
- Added support to import from linux `perf script` [[#135](https://github.com/jlfwong/speedscope/pull/135)]
## [0.6.0] - 2018-08-14
### Added
* Added support for multiple threads/processes [#130]
* Import all runs & threads from Instruments .trace files instead of just main thread from selected run [#130]
- Added support for multiple threads/processes [[#130](https://github.com/jlfwong/speedscope/pull/130)]
- Import all runs & threads from Instruments .trace files instead of just main thread from selected run [[#130](https://github.com/jlfwong/speedscope/pull/130)]
### Fixed
* Ensure the JSON schema has actual contents [#133]
- Ensure the JSON schema has actual contents [[#133](https://github.com/jlfwong/speedscope/pull/133)]
## [0.5.1] - 2018-08-09
### Fixed
* Fixed broken CLI
- Fixed broken CLI
## [0.5.0] - 2018-08-09
### Fixed
* Fix emscripten remapping when symbols contain dashes, like `527:i32s-div` [#129]
* Improved firefox import speed and fixed bugs in it [#128]
* Prevent non-contiguous blocks in the time ordered flamechart from appearing as a single node for selection [#123]
* Prevent dragging from changing selection [#122]
* Clamp zoom to prevent floating point issues [#121]
* Preserve view state when switching tabs [#100]
- Fix emscripten remapping when symbols contain dashes, like `527:i32s-div` [[#129](https://github.com/jlfwong/speedscope/pull/129)]
- Improved firefox import speed and fixed bugs in it [[#128](https://github.com/jlfwong/speedscope/pull/128)]
- Prevent non-contiguous blocks in the time ordered flamechart from appearing as a single node for selection [[#123](https://github.com/jlfwong/speedscope/pull/123)]
- Prevent dragging from changing selection [[#122](https://github.com/jlfwong/speedscope/pull/122)]
- Clamp zoom to prevent floating point issues [[#121](https://github.com/jlfwong/speedscope/pull/121)]
- Preserve view state when switching tabs [[#100](https://github.com/jlfwong/speedscope/pull/100)]
## [0.4.0] - 2018-07-21
### Added
* Support for importing v8 logs from node [#98]
* Optionally read from stdin via cli [#99]
- Support for importing v8 logs from node [[#98](https://github.com/jlfwong/speedscope/pull/98)]
- Optionally read from stdin via cli [[#99](https://github.com/jlfwong/speedscope/pull/99)]
## [0.3.0] - 2018-07-18
### Added
* Support for remapping profiles using a wasm symbol file [#93]
- Support for remapping profiles using a wasm symbol file [[#93](https://github.com/jlfwong/speedscope/pull/93)]
This document describes processes needed by admins of this repository.
# Publishing
Publishing speedscope is a multi-step process:
1. Test the release
2. Prepare the release
3. Publish to npm
4. Deploy the website
5. Upload a release to GitHub
At time of writing, deployment assumes you're running macOS. It probably
works if you're on a linux, and almost definitely does not work on Windows.
@@ -18,8 +8,9 @@ works if you're on a linux, and almost definitely does not work on Windows.
Speedscope is tested in CI, so all the automated tests should be passing. We'll
just be doing a few sanity checks to make sure the build & deployment machinery is working correctly.
Run `scripts/prepare-test-installation.sh`. This will do a mock publish &
installation to ensure that the version we're about to publish is going to
scripts/prepare-test-installation.sh
This will do a mock publish & installation to ensure that the version we're about to publish is going to
work. At the end of this command, it should echo a `cd` command to run in your shell
to switch to the installation directory. Something like this:
@@ -36,53 +27,23 @@ Try importing a profile from disk via the browse button and make sure it works.
Next, try running `bin/cli.js dist/release/perf-vertx*`. This should immediately open
speedscope in browser, and the perf-vertx file should load immediately.
If everything looks good, proceed to "Prepare the release".
## Create & publish the new release
## Prepare the release
Ensure you have the Github CLI tools installed and you're authenticated. Try running the following if you're unsure:
1. Update the version manually in package.json (we intentionally don't use the `npm version` command)
2. Update CHANGELOG.md to indicate the changes that were made as part of this release
3. Commit the changes with the version name as the commit message, e.g. `git commit -m 0.6.0`
4.`git tag` the release. We use tags like `v0.6.0`, e.g. `git tag v0.6.0`
5.`git push --tags`
gh auth status
npm whoami
## Publish to npm
In your default browser, ensure that you're logged into your npm account, otherwise you'll see a 404 page when you open the authenticate link during the npm publish.
Assuming everything went well in the previous two phases, publishing should just be
a matter of running `npm publish`.
Once ready to publish, run:
### Verifying the publish
scripts/publish-and-deploy.sh
To verify that the publish was successful, run `npm install -g speedscope`.
## Verifying the release
To verify that the npm publish was successful, run `npm install -g speedscope`.
Try `speedscope`, which should open speedscope in browser.
Try `speedscope sample/profiles/stackcollapse/simple.txt`, which should immediately load the profile.
## Deploying the website
https://www.speedscope.app/ is hosted on GitHub pages, and is published via pushing
to the `gh-pages` branch. The `gh-pages` branch has totally different contents than
other branches of this repository: https://github.com/jlfwong/speedscope/tree/gh-pages.
It's populated by a deploy script which is invoked by running `npm run deploy` script.
This will do a build of the static resources, and boot a local server for you to test
the compiled assets. Please do not skip the manual testing in this step.
If everything looks good, you should be able to hit Ctrl+C, and you should see this prompt:
```
Commit release? [yes/no]:
```
If everything looks good, type `yes` then enter. This will commit to the `gh-pages` branch, and the site should automatically deploy shortly after.
To check if a deploy has happened, you can check https://www.speedscope.app/release.txt
which includes the version, the date, and the commit of the deploy.
## Upload a release to GitHub
To make a zipfile suitable for uploading to GitHub as a release, run prepare-zip-file.sh. Note that this step must follow the "Publish to npm" step,
since it uses assets from the npm publish.
Once that's done, you should have a zip file in `dist/release/`
Upload that file along with changelog notes to https://github.com/jlfwong/speedscope/releases/new
To verify the website has finished deploying, check the version number shown in the console of https://www.speedscope.app/
A fast, interactive web-based viewer for performance profiles. An alternative viewer for [FlameGraphs][1]. Will happily display multi-megabyte profiles without crashing your browser.
English | [简体中文](./README-zh_CN.md)
# 🔬speedscope
A fast, interactive web-based viewer for performance profiles. Supports import from a variety of profiles in a variety of languages (JS, Ruby, Python, Go & more). Try it here: https://www.speedscope.app
Given raw profiling data, speedscope allows you to interactively explore the data to get insight into what's slow in your application, or allocating all the memory, or whatever data is represented in the profiling data.
@@ -9,6 +9,39 @@ Given raw profiling data, speedscope allows you to interactively explore the dat
speedscope is designed to ingest profiles from a variety of different profilers for different programming languages & environments. Click the links below for documentation on how to import from a specific source.
- JavaScript
- [Importing from Chrome](https://github.com/jlfwong/speedscope/wiki/Importing-from-Chrome)
- [Importing from Firefox](https://github.com/jlfwong/speedscope/wiki/Importing-from-Firefox)
- [Importing from Safari](https://github.com/jlfwong/speedscope/wiki/Importing-from-Safari)
- [Importing from Node.js](https://github.com/jlfwong/speedscope/wiki/Importing-from-Node.js)
- [Importing from Hermes (for React Native)](https://github.com/jlfwong/speedscope/wiki/Importing-from-Hermes)
- Ruby
- [Importing from stackprof](https://github.com/jlfwong/speedscope/wiki/Importing-from-stackprof-(ruby))
- [Importing from rbspy](https://github.com/jlfwong/speedscope/wiki/Importing-from-rbspy-(ruby))
- [Importing from ruby-prof](https://github.com/jlfwong/speedscope/wiki/Importing-from-ruby-prof)
- Python
- [Importing from py-spy](https://github.com/jlfwong/speedscope/wiki/Importing-from-py-spy-(python))
- [Importing from Instruments.app](https://github.com/jlfwong/speedscope/wiki/Importing-from-Instruments.app) (macOS)
- [Importing from `perf`](https://github.com/jlfwong/speedscope/wiki/Importing-from-perf-(linux)) (linux)
- [Importing from .NET Core](https://github.com/jlfwong/speedscope/wiki/Importing-from-.NET-Core)
- [Importing from GHC (Haskell)](https://github.com/jlfwong/speedscope/wiki/Importing-from-Haskell)
- [Importing from custom sources](https://github.com/jlfwong/speedscope/wiki/Importing-from-custom-sources)
Contributions to add support for additional formats are welcome! See issues with the ["import source" tag](https://github.com/jlfwong/speedscope/issues?q=is%3Aissue+is%3Aopen+label%3A%22import+source%22).
# Usage
Visit https://www.speedscope.app, then either browse to find a profile file or drag-and-drop one onto the page. The profiles are not uploaded anywhere -- the application is totally in-browser.
@@ -29,24 +62,6 @@ self-contained version from https://github.com/jlfwong/speedscope/releases.
After you download the zip file from a release, simply unzip it and open the
contained `index.html` in Chrome or Firefox.
## Supported file formats
speedscope is designed to ingest profiles from a variety of different profilers for different programming languages & environments. Click the links below for documentation on how to import from a specific source.
- JavaScript
- [Importing from Chrome](https://github.com/jlfwong/speedscope/wiki/Importing-from-Chrome)
- [Importing from Firefox](https://github.com/jlfwong/speedscope/wiki/Importing-from-Firefox)
- [Importing from Node.js](https://github.com/jlfwong/speedscope/wiki/Importing-from-Node.js)
- Ruby
- [Importing from stackprof](https://github.com/jlfwong/speedscope/wiki/Importing-from-stackprof-(ruby))
- [Importing from rbspy](https://github.com/jlfwong/speedscope/wiki/Importing-from-rbspy-(ruby))
- Native code
- [Importing from Instruments.app](https://github.com/jlfwong/speedscope/wiki/Importing-from-Instruments.app) (macOS)
- [Importing from `perf`](https://github.com/jlfwong/speedscope/wiki/Importing-from-perf-(linux)) (linux)
- [Importing from custom sources](https://github.com/jlfwong/speedscope/wiki/Importing-from-custom-sources)
Contributions to add support for additional formats are welcome! See issues with the ["import source" tag](https://github.com/jlfwong/speedscope/issues?q=is%3Aissue+is%3Aopen+label%3A%22import+source%22).
## Importing via URL
To load a specific profile by URL, you can append a hash fragment like `#profileURL=[URL-encoded profile URL]&title=[URL-encoded custom title]`. Note that the server hosting the profile must have CORS configured to allow AJAX requests from speedscope.
@@ -69,7 +84,7 @@ In the "Left Heavy" view, identical stacks are grouped together, regardless of w
The Sandwich view is a table view in which you can find a list of all functions an their associated times. You can sort by self time or total time.
The Sandwich view is a table view in which you can find a list of all functions and their associated times. You can sort by self time or total time.
It's called "Sandwich" view because if you select one of the rows in the table, you can see flamegraphs for all the callers and callees of the selected
row.
@@ -105,6 +120,8 @@ Once a profile has loaded, the main view is split into two: the top area is the
*`Cmd+O`/`Ctrl+O` to open a new profile
*`n`: Go to next profile/thread if one is available
*`p`: Go to previous profile/thread if one is available
*`t`: Open the profile/thread selector if available
*`Cmd+F`/`Ctrl+F`: to open search. While open, `Enter` and `Shift+Enter` cycle through results
Copyright 2010-2019 Adobe (http://www.adobe.com/), with Reserved Font Name 'Source'. All Rights Reserved. Source is a trademark of Adobe in the United States and/or other countries.
This Font Software is licensed under the SIL Open Font License, Version 1.1.
This license is copied below, and is also available with a FAQ at: http://scripts.sil.org/OFL
4.00 ms 0.1% 0 s dyld4::start(dyld4::KernelArgs*, void*, void*)::$_0::operator()() const
4.00 ms 0.1% 0 s dyld4::prepare(dyld4::APIs&, dyld3::MachOAnalyzer const*)
3.00 ms 0.0% 0 s dyld4::JustInTimeLoader::loadDependents(Diagnostics&, dyld4::RuntimeState&, dyld4::Loader::LoadOptions const&)
3.00 ms 0.0% 0 s mach_o::Header::forEachLinkedDylib(void (char const*, mach_o::LinkedDylibAttributes, mach_o::Version32, mach_o::Version32, bool&) block_pointer) const
3.00 ms 0.0% 0 s mach_o::Header::forEachLoadCommand(void (load_command const*, bool&) block_pointer) const
3.00 ms 0.0% 0 s invocation function for block in mach_o::Header::forEachLinkedDylib(void (char const*, mach_o::LinkedDylibAttributes, mach_o::Version32, mach_o::Version32, bool&) block_pointer) const
3.00 ms 0.0% 0 s invocation function for block in dyld4::JustInTimeLoader::loadDependents(Diagnostics&, dyld4::RuntimeState&, dyld4::Loader::LoadOptions const&)
3.00 ms 0.0% 0 s dyld4::Loader::getLoader(Diagnostics&, dyld4::RuntimeState&, char const*, dyld4::Loader::LoadOptions const&)
3.00 ms 0.0% 0 s dyld4::Loader::forEachPath(Diagnostics&, dyld4::RuntimeState&, char const*, dyld4::Loader::LoadOptions const&, void (char const*, dyld4::ProcessConfig::PathOverrides::Type, bool&) block_pointer)
3.00 ms 0.0% 0 s dyld4::ProcessConfig::PathOverrides::forEachPathVariant(char const*, dyld3::Platform, bool, bool, bool&, void (char const*, dyld4::ProcessConfig::PathOverrides::Type, bool&) block_pointer) const
3.00 ms 0.0% 0 s dyld4::Loader::forEachResolvedAtPathVar(dyld4::RuntimeState&, char const*, dyld4::Loader::LoadOptions const&, dyld4::ProcessConfig::PathOverrides::Type, bool&, void (char const*, dyld4::ProcessConfig::PathOverrides::Type, bool&) block_pointer)
3.00 ms 0.0% 0 s invocation function for block in dyld4::Loader::getLoader(Diagnostics&, dyld4::RuntimeState&, char const*, dyld4::Loader::LoadOptions const&)
3.00 ms 0.0% 0 s dyld4::Loader::makeDyldCacheLoader(Diagnostics&, dyld4::RuntimeState&, char const*, dyld4::Loader::LoadOptions const&, unsigned int, mach_o::Layout const*)
3.00 ms 0.0% 0 s dyld4::RuntimeState::findPrebuiltLoader(char const*) const
3.00 ms 0.0% 0 s dyld4::PrebuiltLoader::isValid(dyld4::RuntimeState const&) const
3.00 ms 0.0% 0 s dyld4::PrebuiltLoader::invalidateInIsolation(dyld4::RuntimeState const&) const
3.00 ms 0.0% 0 s dyld4::ProcessConfig::PathOverrides::forEachPathVariant(char const*, dyld3::Platform, bool, bool, bool&, void (char const*, dyld4::ProcessConfig::PathOverrides::Type, bool&) block_pointer) const
3.00 ms 0.0% 0 s invocation function for block in dyld4::PrebuiltLoader::invalidateInIsolation(dyld4::RuntimeState const&) const
3.00 ms 0.0% 0 s dyld4::SyscallDelegate::fileExists(char const*, dyld4::FileID*, int*) const
3.00 ms 0.0% 0 s dyld3::stat(char const*, stat*)
3.00 ms 0.0% 3.00 ms stat
1.00 ms 0.0% 0 s dyld4::APIs::runAllInitializersForMain()
1.00 ms 0.0% 0 s dyld4::Loader::runInitializersBottomUpPlusUpwardLinks(dyld4::RuntimeState&) const
1.00 ms 0.0% 0 s dyld4::Loader::runInitializersBottomUpPlusUpwardLinks(dyld4::RuntimeState&) const::$_0::operator()() const
1.00 ms 0.0% 0 s dyld4::Loader::runInitializersBottomUp(dyld4::RuntimeState&, dyld3::Array<dyld4::Loader const*>&, dyld3::Array<dyld4::Loader const*>&) const
1.00 ms 0.0% 0 s dyld4::Loader::runInitializersBottomUp(dyld4::RuntimeState&, dyld3::Array<dyld4::Loader const*>&, dyld3::Array<dyld4::Loader const*>&) const
1.00 ms 0.0% 0 s dyld4::Loader::runInitializersBottomUp(dyld4::RuntimeState&, dyld3::Array<dyld4::Loader const*>&, dyld3::Array<dyld4::Loader const*>&) const
1.00 ms 0.0% 0 s dyld4::PrebuiltLoader::runInitializers(dyld4::RuntimeState&) const
1.00 ms 0.0% 0 s dyld4::Loader::findAndRunAllInitializers(dyld4::RuntimeState&) const
1.00 ms 0.0% 0 s dyld3::MachOAnalyzer::forEachInitializer(Diagnostics&, dyld3::MachOAnalyzer::VMAddrConverter const&, void (unsigned int) block_pointer, void const*) const
1.00 ms 0.0% 0 s dyld3::MachOFile::forEachSection(void (dyld3::MachOFile::SectionInfo const&, bool, bool&) block_pointer) const
1.00 ms 0.0% 0 s dyld3::MachOFile::forEachLoadCommand(Diagnostics&, void (load_command const*, bool&) block_pointer) const
1.00 ms 0.0% 0 s invocation function for block in dyld3::MachOFile::forEachSection(void (dyld3::MachOFile::SectionInfo const&, bool, bool&) block_pointer) const
1.00 ms 0.0% 0 s invocation function for block in dyld3::MachOAnalyzer::forEachInitializer(Diagnostics&, dyld3::MachOAnalyzer::VMAddrConverter const&, void (unsigned int) block_pointer, void const*) const
1.00 ms 0.0% 1.00 ms _GLOBAL__sub_I_stdlib_typed_new.cpp
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