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denoland-deno/tools/bench/rebench.js

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751 B
JavaScript

// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
export function benchSync(name, n, innerLoop) {
const t1 = Date.now();
for (let i = 0; i < n; i++) {
innerLoop(i);
}
const t2 = Date.now();
console.log(benchStats(name, n, t1, t2));
}
export async function benchAsync(name, n, innerLoop) {
const t1 = Date.now();
for (let i = 0; i < n; i++) {
await innerLoop(i);
}
const t2 = Date.now();
console.log(benchStats(name, n, t1, t2));
}
function benchStats(name, n, t1, t2) {
const dt = (t2 - t1) / 1e3;
const r = n / dt;
const ns = Math.floor(dt / n * 1e9);
return `${name}:${" ".repeat(20 - name.length)}\t` +
`n = ${n}, dt = ${dt.toFixed(3)}s, r = ${r.toFixed(0)}/s, t = ${ns}ns/op`;
}