benchparse.js

index.js

const fs = require('fs');
const path = require('path');

const Benchmark = require('benchmark');
const suite = new Benchmark.Suite;

const ts = require('typescript');
const acorn = require('acorn');
const babylon = require('babylon');

const parseWithTypeScript = (sourcefile) => ts.createSourceFile('parse-me.js', sourcefile, ts.ScriptTarget.Latest, false, ts.ScriptKind.JS);
const parseWithAcorn = (sourcefile) => acorn.parse(sourcefile, {sourceType: 'module'});
const parseWithBabylon = (sourcefile) => babylon.parse(sourcefile, { sourceType: 'module' });

const scriptSource = fs.readFileSync(path.join(__dirname, 'node_modules', 'typescript', 'lib', 'typescript.js')).toString();

suite
    .add('acorn parse', () => parseWithAcorn(scriptSource))
    .add('typescript parse', () => parseWithTypeScript(scriptSource))
    .add('babylon parse', () => parseWithBabylon(scriptSource))
    .on('cycle', (event) => {console.log(String(event.target))})
    .on('complete', function (){ console.log('Fastest is ' + this.filter('fastest').map('name')) })
    .run({'asnyc': true});