Javascript code for making my browser slow down

Question

I\'m writing a library for WebWorkers, and I want to test the difference between running a script in the main page thread, versus in one or more workers. The problem is: I can\'

Answer 1

/**
 * Block CPU for the given amount of seconds
 * @param {Number} [seconds]
 */
function slowdown(seconds = 0.5) {
  const start = (new Date()).getTime()
  let end = start
  while (end - start < seconds * 1000) {
    end = (new Date()).getTime()
  }
}

Calling this method will slow code down for the given amount of seconds (with ~200ms precision).