Benchmark.jsの実装例 - Qiita

const fs = require('fs'); const Benchmark = require('benchmark'); const suite = new Benchmark.Suite; suite .add('readFileSync', { fn: () => { fs.readFileSync('./testfile.txt', { encoding: 'utf8' }); } }) .add('readFile', { defer: true, fn: (deferred) => { fs.readFile('./testfile.txt', { encoding: 'utf8' }, (error, data) => { deferred.resolve(); }); } }) .on('cycle', (event) => { console.log(String