Jamie Wong
405e751bbb
* Split profile building APIs into dedicated classes * Split value formatters into their own file * Add tests for formatters * Add test for StackListProfileBuilder * Add test for CallTreeProfileBuilder
31 lines
925 B
TypeScript
31 lines
925 B
TypeScript
// https://github.com/brendangregg/FlameGraph#2-fold-stacks
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import {Profile, FrameInfo, StackListProfileBuilder} from '../profile'
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interface BGSample {
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stack: FrameInfo[]
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duration: number
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}
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function parseBGFoldedStacks(contents: string): BGSample[] {
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const samples: BGSample[] = []
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contents.replace(/^(.*) (\d+)$/gm, (match: string, stack: string, n: string) => {
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samples.push({
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stack: stack.split(';').map(name => ({key: name, name: name})),
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duration: parseInt(n, 10),
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})
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return match
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})
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return samples
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}
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export function importFromBGFlameGraph(contents: string): Profile {
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const parsed = parseBGFoldedStacks(contents)
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const duration = parsed.reduce((prev: number, cur: BGSample) => prev + cur.duration, 0)
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const profile = new StackListProfileBuilder(duration)
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for (let sample of parsed) {
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profile.appendSample(sample.stack, sample.duration)
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}
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return profile.build()
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}
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