denoland-deno/cli/bench/getrandom.js

// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.

// deno-lint-ignore-file no-console

let [total, count] = typeof Deno !== "undefined"
  ? Deno.args
  : [process.argv[2], process.argv[3]];

total = total ? parseInt(total, 0) : 50;
count = count ? parseInt(count, 10) : 100000;

async function bench(fun) {
  const start = Date.now();
  for (let i = 0; i < count; i++) await fun();
  const elapsed = Date.now() - start;
  const rate = Math.floor(count / (elapsed / 1000));
  console.log(`time ${elapsed} ms rate ${rate}`);
  if (--total) await bench(fun);
}

const c = typeof crypto !== "undefined" ? crypto : require("crypto").webcrypto;

const ui8 = new Uint8Array(1024);
bench(() => c.getRandomValues(ui8));