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Quick benchmarking utility function
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| /** | |
| // HOW TO USE IT | |
| const test = require('./wherever/it/is/test') | |
| function myFunc1 (a,b) { ... } | |
| function myFunc2 (a,b) { ... } | |
| const benchs = [{ | |
| in: [[1,2,3.4], 'test'], | |
| out: true | |
| }, ...] | |
| test( | |
| benchs, | |
| [myFunc1, myFunc2], | |
| {iterations:1e3, stepDetail: false}// default | |
| ) | |
| */ | |
| const formatX = (map, base) => (s, prec = 2) => { | |
| if (s == 0) return `0 ${base}`; | |
| let n = 0, nInt = 0; | |
| for (let i in map) { | |
| if (s >= map[i]) { | |
| n = parseFloat((s / map[i]).toFixed(prec), 10); | |
| nInt = parseInt(n, 10); | |
| n = n == nInt ? nInt : n; | |
| return `${n} ${i}`; | |
| } | |
| } | |
| }, | |
| formatSize = formatX({GB: 2 << 29, MB: 2 << 19, KB: 2 << 9, B: 1}, 'B'), | |
| formatTime = formatX({m: 60e3, s: 1e3, ms: 1, µs: 1e-3, ns: 1e-6}, 'ms'); | |
| module.exports = (bs, imp, options = {}) => { | |
| const iterations = options.iterations || 1e3, | |
| stepDetail = options.stepDetail || false, | |
| impls = (imp.constructor.name === 'Array') ? imp : [imp], | |
| globs = []; | |
| impls.forEach(impl => { | |
| const name = impl.name; | |
| console.log(`› Testing \`${name}\``); | |
| const out = {ok: 0, ko : 0}, | |
| times = [], | |
| sym = ['\u2717','\u2713' ], | |
| upStart = + new Date(); | |
| bs.forEach((b, i) => { | |
| const start = +new Date(); | |
| let j = 0, r; | |
| while (j++ < iterations) r = impl(...b.in); | |
| const end = +new Date(); | |
| times[i] = end - start; | |
| const spent = formatTime(times[i] / iterations); | |
| if (JSON.stringify(r) === JSON.stringify(b.out)){ | |
| stepDetail && console.log(`${sym[1]} test #${i+1} passed ${spent}`); | |
| out.ok++; | |
| } else { | |
| if (stepDetail) { | |
| console.log(`${sym[0]} test #${i+1} failed ${spent}`); | |
| console.log('| expected:', b.out); | |
| console.log('| received:', r); | |
| console.log('\'+-------'); | |
| } | |
| out.ko++; | |
| } | |
| }) | |
| var upEnd = + new Date(), | |
| globTime = upEnd - upStart; | |
| console.log(`Passed ${out.ok} | Failed ${out.ko}`); | |
| console.log(`Total time ${formatTime(globTime, 1)}`); | |
| if (!out.ko) { | |
| globs.push({name, time : globTime}) | |
| } | |
| console.log(`Consuming ~${formatSize(process.memoryUsage().heapUsed)}`) | |
| console.log('') | |
| }) | |
| if (globs.length > 1) { | |
| console.log('∆ PODIUM') | |
| globs.sort((a,b) => a.time - b.time).forEach((impl, i) => { | |
| console.log(`${i+1}${['st','nd','rd',][i] || 'th'} place to ${impl.name} : ${formatTime(impl.time)}`) | |
| }) | |
| } | |
| } |
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