load-benchmark.js

#!/usr/bin/env node
'use strict';

// npm install stats-lite
// export PATH="/System/Library/Frameworks/JavaScriptCore.framework/Versions/Current/Resources:$PATH"
// ./node_modules/.bin/grunt build
// node load-benchmark.js

const {spawnSync} = require('child_process');
const stats = require('stats-lite');

const runs = [
  {engine: 'node', NODE_ENV: 'development', build: 'react.js'},
  {engine: 'node', NODE_ENV: 'production', build: 'react.js'},

  {engine: 'node', build: 'dist/react-with-addons.js'},
  {engine: 'node', build: 'dist/react-with-addons.min.js'},
  {engine: 'node', build: 'dist/react.js'},
  {engine: 'node', build: 'dist/react.min.js'},

  {engine: 'jsc', build: 'dist/react-with-addons.js'},
  {engine: 'jsc', build: 'dist/react-with-addons.min.js'},
  {engine: 'jsc', build: 'dist/react.js'},
  {engine: 'jsc', build: 'dist/react.min.js'},
];

runs.map(trial => {
  const {engine, build, NODE_ENV} = trial;
  const times = Array(100).fill().map(() => {
    const ps = spawnSync(engine, ['-e', `
      if (typeof require === 'undefined') require = load;
      if (typeof console === 'undefined') console = {log: print};
      var t1 = Date.now();
      require('./build/packages/react/${build}');
      var t2 = Date.now();
      console.log(t2 - t1);
    `], {
      env: Object.assign({}, process.env, {NODE_ENV})
    });
    return parseInt(ps.stdout);
  });
  trial.mean = stats.mean(times);
  trial.p90 = stats.percentile(times, 0.90);
  trial.p95 = stats.percentile(times, 0.95);
});

console.log('| engine | build | avg / p90 (ms) |');
console.log('| ------ | ----- | -------------: |');
runs.forEach(({engine, build, NODE_ENV, mean, p90}) => {
  console.log(
    '| %s | %s | %s |',
    engine,
    NODE_ENV ? `${build} (${NODE_ENV})` : build,
    `${mean.toFixed(2)} / ${p90}`
  );
});