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