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Benchmark.jsの実装例

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Benchmark.jsの実装例

備忘録代わりに

実行環境

  • Node.js 11.5.0
  • benchmark 2.1.4

コード

callback関数に関するベンチマークはdeferを利用すれば良い

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(event.target));
    })
    .on('complete', () => {
        console.log('Fastest is ' + suite.filter('fastest').map('name'));
    })
    .run({ async: true });

実行結果

readFileSync x 38,949 ops/sec ±3.99% (80 runs sampled)
readFile x 9,808 ops/sec ±3.82% (74 runs sampled)
Fastest is readFileSync
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