Benchmarking JavaScript - Asynchronous execution

benchmark.js

const runTest = (iterations = 100000000) => {
  let startTime = new Date().getTime();

  for (let i = 0; i < iterations; i++)
    Math.log10(0)

  let endTime = new Date().getTime();
  let totalTime = endTime - startTime;
  let fnTime = (totalTime / iterations).toFixed(10);
  let operations = Math.floor(1000 / totalTime * iterations);

  console.log(`total: ${totalTime}, time: ${fnTime}, op/sec: ${operations}`);
}

while (true) {
  runTest();
  await sleep(50);
}

function sleep(ms) {
  return new Promise(resolve => setTimeout(resolve, ms));
}