Run results for: all variety of loops in js - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:135.0) Gecko/20100101 Firefox/135.0

Browser: Firefox 135

Operating system: Windows

Device Platform: Desktop

Date tested: 2 months ago

Test name	Executions per second
foreach	193503.8 Ops/sec
for++	1292312.2 Ops/sec
map	145463.1 Ops/sec
for of	185021.5 Ops/sec
for in	16869.4 Ops/sec
filter	113887.5 Ops/sec
reduce	188659.8 Ops/sec

Script Preparation code:

   var arr = [];
    for (var i = 0; i < 1000; i++) {
      arr[i] = i;
    }
  
    function someFn(i) {
      return i * 3 * 8;
    }

Tests:

foreach
arr.forEach(function (item){ someFn(item); })
for++
for (var i = 0, len = arr.length; i < len; i++) { someFn(arr[i]); }
map
arr.map(item => someFn(item))
for of
for (var value of arr) { someFn(value); }
for in
for (var i in arr) { someFn(arr[i]); }
filter
arr.filter(item => someFn(item))
reduce
arr.reduce(item => someFn(item))