performanceCompare

index.js

const performanceCompare = (callBack1, callBack2, amplifier=10000) => {
  callBack1();
  callBack2();
  const t1 = performance.now();
  callBack1();
  const t2 = performance.now();
  const t3 = performance.now();
  callBack2();
  const t4 = performance.now();
  const perform1 = ~~(t2-t1);
  const perform2 = ~~(t4-t3);
  if(perform1 || perform2) {
    return `${callBack1} took ${perform1} milliseconds while ${callBack2} took ${perform2} milliseconds`
  }
  const t5 = performance.now();
  for(let i = 0; i < amplifier; i+=1) {
    callBack1();
  }
  const t6 = performance.now();

  const t7 = performance.now();
  for(let j = 0; j < amplifier; j+=1) {
    callBack2();
  }
  const t8 = performance.now();

  const perform3 = ~~(t6-t5);
  const perform4 = ~~(t8-t7);
  return `iterating ${amplifier} times ${callBack1} took ${perform3} milliseconds while ${callBack2} took ${perform4} milliseconds`
}