Programmable interface to Clinic.js Heap Profiler. 

Programmable interface to Clinic.js Heap Profiler

matteo.collina

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simoneb

rafaelgss

@clinic/heap-profiler

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  "description": "Programmable interface to Clinic.js Heap Profiler",

  "repository": "https://github.com/clinicjs/node-clinic-heap-profiler",

    "visualize-watch": "node debug/visualize-watch.js",

    "visualize-all": "node debug/visualize-all.js",

    "test:file": "standard | snazzy && tap --no-cov",

      "--exclude=visualizer/data-tree.js",

      "--exclude=visualizer/no-data-node.js"

const { spawn } = require('child_process')

const { ensureDir } = require('fs-extra')

const { createConnection, createServer } = require('net')

const buildJs = require('@clinic/clinic-common/scripts/build-js')

const buildCss = require('@clinic/clinic-common/scripts/build-css')

const mainTemplate = require('@clinic/clinic-common/templates/main')

const { analyse } = require('./analysis/index.js')

function execute (instance, args, env, nodeOptions, cb) {

  ensureDir(path.dirname(instance.dest), err => {

      By default spawn creates a process in the same process group of the current one.

      This means that SIGINT are received both from the parent and child processes.

      We handle SIGINT in the child, so we want to ignore in the parent.

    instance.process = spawn(args[0], args.slice(1), { stdio: ['ignore', 'inherit', 'inherit'], env })

    instance.process.once('exit', (code, signal) => {

      process.removeListener('SIGINT', noop)

      if (code && !instance.collectOnFailure) {

        cb(new Error(`Child process exited with code ${code}.`))

function writeHtml (data, outputFilename, debug, cb) {

  const fakeDataPath = path.join(__dirname, 'visualizer', 'data.json')

  const stylePath = path.join(__dirname, 'visualizer', 'style.css')

  const scriptPath = path.join(__dirname, 'visualizer', 'main.js')

  const logoPath = path.join(__dirname, 'visualizer/assets', 'heap-profiler-logo.svg')

  const clinicFaviconPath = path.join(__dirname, 'visualizer', 'clinic-favicon.png.b64')

  const logoFile = fs.createReadStream(logoPath)

  const clinicFaviconBase64 = fs.createReadStream(clinicFaviconPath)

  const version = require('../package.json').version

      b.require({ source: JSON.stringify(data), file: fakeDataPath })

      PRESENTATION_MODE: process.env.PRESENTATION_MODE

  const styleFile = buildCss({ stylePath, debug })

    headerLogoUrl: 'https://clinicjs.org/heap-profiler/',

    headerLogoTitle: 'Clinic Heap Profiler on Clinicjs.org',

    uploadId: outputFilename.split('/').pop().split('.html').shift(),

  pump(outputFile, fs.createWriteStream(outputFilename), cb)

class ClinicHeapProfiler extends events.EventEmitter {

      dest = `.clinic/${process.pid}.clinic-heapprofile`

      dest = `.clinic/${name || process.pid}.clinic-heapprofiler`

    this.collectOnFailure = !!collectOnFailure

    const nodeOptions = ` -r ${path.join(__dirname, './injects/ipc.js')}`

      HEAP_PROFILER_DESTINATION: this.dest,

      HEAP_PROFILER_PRELOADER_DISABLED: 'true',

      HEAP_PROFILER_USE_IPC: this.detectPort

      execute(this, args, env, nodeOptions, cb)

    const server = createServer(socket => {

        const port = parseInt(raw.toString(), 0)

        if (this.detectPort && this.ipcPort && applicationPort) {

            The last argument, by clinic CLI contract, is required when using --autocannon or --on-port option.

            The CLI invokes the callback when the tool --autocannon or --on-port tool has finished.

          this.emit('port', applicationPort, null, this.stopViaIPC.bind(this))

      env.CLINIC_HEAP_PROFILER_PORT = server.address().port

  visualize (sourceFile, outputFilename, cb) {

    analyse(sourceFile, (err, converted) => {

      writeHtml(converted, outputFilename, this.debug, cb)

    const client = createConnection({ port: this.ipcPort }, () => {

      client.end('clinic-heap-profiler:stop')

const sinusoidalDecimal = require('sinusoidal-decimal')

const getNoDataNode = require('./no-data-node.js')

  const red = Math.round(255 * sinusoidalDecimal(decimal, -0.5, 0.5, true))

  const green = Math.round(255 * sinusoidalDecimal(decimal, 0.2, 1.0, true))

  const blue = Math.round(255 * sinusoidalDecimal(decimal, -0.7, 1.0, true))

  return `rgb(${red}, ${green}, ${blue})`

    // Set a reasonable upper limit to displayed name; exact name matching is done in analysis

    this.appName = tree.appName && tree.appName.length > 30 ? tree.appName.slice(0, 30) + '…' : tree.appName

    this.pathSeparator = tree.pathSeparator

    this.dataNodes = flatten(this.data.children)

    this.exclude = new Set(['all-v8:v8', 'all-v8:cpp', 'all-v8:native', 'all-v8:regexp', 'is:init'])

    this.mean = d3.mean(this.sortedAllocations, node => node.selfValue / this.total)

    this.calculateRoots([this.data, ...this.dataNodes])

    return arr.find(node => node.id === id)

      // Value of hidden frames is the sum of their visible children

        ? node.children.reduce((acc, child) => {

            return acc + this.getNodeValue(child)

    return `${node.category}:${node.type}`

    const filtered = arr.filter(node => !this.isNodeExcluded(node))

    if (filtered.length) return filtered.sort(sorter)

    return this.sortedAllocations.indexOf(node)

  getHeatColor (node, arr = this.sortedAllocations) {

      if (!node || node.type === 'no-data' || node.isRoot || this.isNodeExcluded(node) || this.mean === 0) {

      const pivotPoint = this.mean / (this.mean + this.maxAboveAdjusted + this.maxBelowAdjusted)

      if (node.adjustedPercentage === 0) {

      if (node.adjustedPercentage > this.mean) {

        return flameGradient(pivotPoint + (node.adjustedPercentage / this.maxAboveAdjusted) * (0.95 - pivotPoint))

        return flameGradient(pivotPoint - (node.adjustedPercentage / this.maxBelowAdjusted) * pivotPoint)

      console.error('Cannot compute heat color for node', node)

		{
		"name": "@clinic/heap-profiler",
		"version": "4.0.0",
		"version": "4.1.0",
		"description": "Programmable interface to Clinic.js Heap Profiler",
		@@ -35,3 +35,3 @@ "repository": "https://github.com/clinicjs/node-clinic-heap-profiler",
		"d3-selection": "^1.3.2",
		"fs-extra": "^10.0.1",
		"fs-extra": "^11.0.0",
		"lodash.debounce": "^4.0.8",
		@@ -38,0 +38,0 @@ "on-net-listen": "1.1.2",

		@@ -108,3 +108,4 @@ 'use strict'
		debug = false,
		dest = `.clinic/${process.pid}.clinic-heapprofile`
		name,
		dest = `.clinic/${name \|\| process.pid}.clinic-heapprofiler`
		} = settings
		@@ -111,0 +112,0 @@

		@@ -79,4 +79,4 @@ 'use strict'
		? node.children.reduce((acc, child) => {
		return acc + this.getNodeValue(child)
		}, 0)
		return acc + this.getNodeValue(child)
		}, 0)
		: 0
		@@ -83,0 +83,0 @@ }

		@@ -92,4 +92,4 @@ 'use strict'
		? thinFrameReducer
		// ...fade as above, but based on the width of these same-area siblings, not just this node, so that
		// something like [ someFunc ./file.js ][ f ./file.js ][][]\|\|\| gets a visible right hand edge
		// ...fade as above, but based on the width of these same-area siblings, not just this node, so that
		// something like [ someFunc ./file.js ][ f ./file.js ][][]\|\|\| gets a visible right hand edge
		: Math.min(1, visibleSiblings.slice(0, indexPosition).reduce((acc, sibling) => acc + (sameArea(nodeData, sibling.data) ? (sibling.x1 - sibling.x0) * widthRatio : 0), 0) / (lineWidth * 2))
		@@ -96,0 +96,0 @@

		@@ -24,3 +24,3 @@ 'use strict'

		t.match(filename, /[0-9]+\.clinic-heapprofile$/)
		t.match(filename, /[0-9]+\.clinic-heapprofiler$/)

		@@ -27,0 +27,0 @@ fs.unlink(filename, callback)

Improved metrics

Dependency changes

		@@ -14,3 +14,3 @@ 'use strict'

		t.match(filename, /[0-9]+\.clinic-heapprofile$/)
		t.match(filename, /[0-9]+\.clinic-heapprofiler$/)

		@@ -17,0 +17,0 @@ fs.unlink(filename, err => {

		@@ -25,3 +25,3 @@ 'use strict'

		t.match(filename, /[0-9]+\.clinic-heapprofile$/)
		t.match(filename, /[0-9]+\.clinic-heapprofiler$/)

		@@ -28,0 +28,0 @@ fs.unlink(filename, callback)

		@@ -23,3 +23,3 @@ 'use strict'

		t.match(filename, /[0-9]+\.clinic-heapprofile$/)
		t.match(filename, /[0-9]+\.clinic-heapprofiler$/)

		@@ -26,0 +26,0 @@ fs.unlink(filename, err => {