yield_comparison.js

{
  const sleepZeroMsgChannel = () => {
    return new Promise((resolve) => {
      const ch = new MessageChannel();
      ch.port1.addEventListener('message', () => resolve());
      ch.port2.postMessage(0);
      ch.port1.start();
    });
  };

  const sleepZeroSetTimeout = () => new Promise((resolve) => setTimeout(resolve, 0));

  const time = async (fn) => {
    const count = 1000;
    let sum = 0;

    for (let i = 0; i < count; i++) {
      const start = globalThis.performance.now();
      await fn();
      const end = globalThis.performance.now();
      sum = end - start;
    }

    console.log(fn.name, sum / count, 'ns');
  };

  time(sleepZeroSetTimeout)
  time(sleepZeroMsgChannel)
}