47 lines
1.5 KiB
JavaScript
47 lines
1.5 KiB
JavaScript
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"use strict";
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module.exports = newSuite;
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var benchmark = require("benchmark"),
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chalk = require("chalk");
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var padSize = 27;
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function newSuite(name) {
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var benches = [];
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return new benchmark.Suite(name)
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.on("add", function(event) {
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benches.push(event.target);
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})
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.on("start", function() {
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process.stdout.write("benchmarking " + name + " performance ...\n\n");
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})
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.on("cycle", function(event) {
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process.stdout.write(String(event.target) + "\n");
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})
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.on("complete", function() {
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if (benches.length > 1) {
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var fastest = this.filter("fastest"), // eslint-disable-line no-invalid-this
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fastestHz = getHz(fastest[0]);
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process.stdout.write("\n" + chalk.white(pad(fastest[0].name, padSize)) + " was " + chalk.green("fastest") + "\n");
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benches.forEach(function(bench) {
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if (fastest.indexOf(bench) === 0)
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return;
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var hz = hz = getHz(bench);
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var percent = (1 - hz / fastestHz) * 100;
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process.stdout.write(chalk.white(pad(bench.name, padSize)) + " was " + chalk.red(percent.toFixed(1) + "% slower") + "\n");
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});
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}
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process.stdout.write("\n");
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});
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}
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function getHz(bench) {
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return 1 / (bench.stats.mean + bench.stats.moe);
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}
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function pad(str, len, l) {
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while (str.length < len)
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str = l ? str + " " : " " + str;
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return str;
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}
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