benchmarkjs-pretty/dist/index.js

Tiny wrapper around benchmarkjs with a simpler api

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.SimpleLogger = void 0;
const kolor = require("kolorist");
const benchmark_1 = require("benchmark");
function SimpleLogger(log = console.log) {
    return {
        start(name) {
            log(kolor.underline(name + ":"));
        },
        complete(fastest) {
            log(`\nFastest is ${kolor.green(fastest)}\n`);
        },
        cycle(name, ops, delta, runs) {
            const opsDisplay = kolor.yellow(new Intl.NumberFormat("en", {
                maximumFractionDigits: 3,
                useGrouping: true,
            }).format(ops));
            const deltaDisplay = delta.toFixed(2);
            log(`${name} ${kolor.dim("x")} ${opsDisplay} ${kolor.dim("ops/sec")} ±${deltaDisplay} ${kolor.dim("(" + runs + " runs sampled)")}`);
        },
    };
}
exports.SimpleLogger = SimpleLogger;
class Benchmark {
    constructor(name = "", logger = SimpleLogger(), suite = new benchmark_1.Suite()) {
        this.name = name;
        this.logger = logger;
        this.suite = suite;
        this.hasErrored = false;
        if (this.name !== "") {
            this.suite.on("start", () => {
                this.logger.start(this.name);
            });
        }
        this.suite.on("cycle", (event) => {
            if (this.hasErrored) {
                return;
            }
            const bench = event.target;
            this.logger.cycle(bench.name, bench.hz, bench.stats.rme, bench.stats.sample.length);
        });
    }
    add(name, fn) {
        this.suite.add(name, fn);
        return this;
    }
    run() {
        return new Promise((resolve, reject) => {
            // tslint:disable-next-line no-this-assignment
            const self = this;
            this.suite.on("complete", function () {
                if (self.hasErrored) {
                    return;
                }
                const winner = this.filter("fastest").map("name");
                self.logger.complete(winner);
                resolve();
            });
            this.suite.on("error", (event) => {
                self.hasErrored = true;
                reject(event.target.error);
            });
            this.suite.run({ async: true });
        });
    }
}
exports.default = Benchmark;
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