Run results for: forEach vs reduce vs map vs filter vs for add code

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:121.0) Gecko/20100101 Firefox/121.0

Browser: Firefox 121

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

forEach

2K/s

filter

2K/s

View exact numbers

Test name	Executions per second
✓ forEach	1,905 Ops/sec
filter	1,841 Ops/sec

Script Preparation code:

var arr = [];
for (var i = 0; i < 12345; i++) {
  arr[i] = i;
}

function someFn(i) {
  return (i * 3 * 8 / 1200 * 0.002 / 40 * 0.2);
}

var sumForEach = 0,
  sumReduce = 0,
  sumMap = 0,
  sumFilter = 0,
  sumFor = 0;
  newArray = [];

Tests:

forEach
arr.forEach(item => { sumForEach += someFn(item); if(item % 2 === 0) { newArray.push(item) } });
filter
arr.filter(item => { if(item % 2 === 0) { newArray.push(item) } return sumForEach += someFn(item); });