8cddf3fe81
As said on #170, i added the support for the old format used by https://github.com/hyj1991/v8-profiler-node8 (which is currently used for pm2.io).
61 lines
1.8 KiB
JavaScript
61 lines
1.8 KiB
JavaScript
/*
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* This script is used to reconstruct an cpu profile from chrome with an old format
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* still used in nodejs with v8-profiler
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*/
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const fs = require('fs')
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const data = JSON.parse(fs.readFileSync('../../profiles/Chrome/65/simple.cpuprofile').toString())
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const _convertTimeDeltas = (profile) => {
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if (!profile.timeDeltas) return null
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let lastTimeUsec = profile.startTime
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const timestamps = new Array(profile.timeDeltas.length + 1)
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for (let i = 0; i < profile.timeDeltas.length; ++i) {
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timestamps[i] = lastTimeUsec
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lastTimeUsec += profile.timeDeltas[i]
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}
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timestamps[profile.timeDeltas.length] = lastTimeUsec
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return timestamps
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}
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const reformatNode = node => {
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if (!node.children) node.children = []
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node.children = node.children.map(childID => {
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if (typeof childID !== 'number') return childID
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const childNode = data.nodes.find(node => node.id === childID)
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if (typeof childNode !== 'object') return null
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childNode.callUID = node.id
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return childNode
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})
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return {
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functionName: node.callFrame.functionName,
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url: node.callFrame.url,
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lineNumber: node.callFrame.lineNumber,
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callUID: node.callUID,
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bailoutReason: '',
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id: node.id,
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scriptId: 0,
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hitCount: node.hitCount,
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children: node.children.map(reformatNode)
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}
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}
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// reformat then only keep the root as top level node
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const nodes = data.nodes
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.map(reformatNode)
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.filter(node => node.functionName === '(root)')[0]
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// since it can be undefined, create an array so execution still works
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if (!data.timeDeltas) {
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data.timeDeltas = []
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}
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fs.writeFileSync('./new.cpuprofile', JSON.stringify({
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head: nodes,
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startTime: Math.floor(data.startTime / 1000000),
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endTime: Math.floor(data.endTime / 1000000),
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samples: data.samples,
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timestamps: _convertTimeDeltas(data)
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}))
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