30-seconds-of-code/snippets/measure-time-taken-by-function.md

Measure time taken by function

Use performance.now() to get start and end time for the function, console.log() the time taken. Pass a callback function as the argument.

const timeTaken = callback => {
  const t0 = performance.now(), r = callback();
  console.log(performance.now() - t0);
  return r;
};
// timeTaken(() => Math.pow(2, 10)) -> 1024 (0.010000000009313226 logged in console)