picocolors benchmark

README.md

$ node runner.js
baseline   { median: 43.16093, mean: 43.08483823809524 }
nanocolors { median: 47.465964, mean: 47.202760285714284 }
picocolors { median: 44.478806, mean: 44.252607809523816 }
chalk      { median: 46.725678, mean: 47.159447523809526 }
picocolors { median: 44.538646, mean: 46.444677000000006 }
nanocolors { median: 47.159858, mean: 47.785727 }
baseline   { median: 40.406613, mean: 40.227075666666664 }
chalk      { median: 48.239906, mean: 48.22988314285714 }
chalk      { median: 46.789621, mean: 46.71492319047619 }
picocolors { median: 43.16284, mean: 43.29260742857143 }
nanocolors { median: 42.462206, mean: 42.86361261904762 }
baseline   { median: 40.483498, mean: 40.502954952380954 }

$ node runner.js
baseline   { median: 41.804987, mean: 41.85401666666666 }
nanocolors { median: 45.051437, mean: 45.10202047619049 }
picocolors { median: 42.653881, mean: 42.79689666666667 }
chalk      { median: 49.352838, mean: 49.264932476190474 }
picocolors { median: 43.797655, mean: 44.003986761904756 }
nanocolors { median: 43.388026, mean: 43.307937 }
baseline   { median: 39.452398, mean: 39.344745095238096 }
chalk      { median: 46.804137, mean: 46.92536761904762 }
chalk      { median: 47.6746, mean: 47.61350923809524 }
picocolors { median: 43.324013, mean: 43.02372380952381 }
nanocolors { median: 42.498683, mean: 43.141994857142855 }
baseline   { median: 40.574111, mean: 41.608522047619054 }

baseline.js

// empty

chalk.js

let c = require('chalk');
c.red('hello c');

nanocolors.js

let c = require('nanocolors');
c.red('hello n');

picocolors.js

let c = require('../picocolors.js');
c.red('hello n');

runner.js

'use strict';

const { fork } = require('child_process');
const hrtime = process.hrtime.bigint;

const pfork = (path) => new Promise((resolve) => {
    const start = hrtime();
    fork(path).on('exit', () => resolve(Number(hrtime() - start)/1e6));
});

async function bench(path, N = 25) {
    path = require.resolve(path);
    let t = [];
    for (let i = 0; i < N; i++) {
        t.push(await pfork(path));
    }
    t.sort((a, b) => a - b);

    return {
        median: t[(N/2)|0],
        mean: t.slice(2, -2).reduce((a, v) => a + v) / (N - 4)
    };
}

let baseline = 0;
Promise.resolve()
    .then(() => bench('./baseline'))
    .then((t) => { console.log('baseline  ', t) })
    .then(() => bench('./nanocolors'))
    .then((t) => { console.log('nanocolors', t) })
    .then(() => bench('./picocolors'))
    .then((t) => { console.log('picocolors', t) })
    .then(() => bench('./chalk'))
    .then((t) => { console.log('chalk     ', t) })
    .then(() => bench('./picocolors'))
    .then((t) => { console.log('picocolors', t) })
    .then(() => bench('./nanocolors'))
    .then((t) => { console.log('nanocolors', t) })
    .then(() => bench('./baseline'))
    .then((t) => { console.log('baseline  ', t) })
    .then(() => bench('./chalk'))
    .then((t) => { console.log('chalk     ', t) })
    .then(() => bench('./chalk'))
    .then((t) => { console.log('chalk     ', t) })
    .then(() => bench('./picocolors'))
    .then((t) => { console.log('picocolors', t) })
    .then(() => bench('./nanocolors'))
    .then((t) => { console.log('nanocolors', t) })
    .then(() => bench('./baseline'))
    .then((t) => { console.log('baseline  ', t) })