test-speed.js

testSpeed = ({cb, tries=10, iterations=Math.pow(2, 20)}) => {
  let state = {
    tries,
    iterations,
    results: []
  }
  for (var t =0; t < tries; t++){
    let startTime = Date.now()
    for(var i = 0; i < iterations; i++){
      cb()
    }
    state.results.push(Date.now() - startTime)
  }
  state.min = state.results.reduce((r, n) => Math.min(r, n))
  state.max = state.results.reduce((r, n) => Math.max(r, n))
  state.diference = state.max - state.min
  state.totalTime = state.results.reduce((r, n) => r + n) 
  state.average = state.totalTime / 10
  return state
}

testSpeed({cb: () => {}, iterations: Math.pow(2, 28), tries: 25})