Run results for: for vs foreach vs some vs for..of without browser optim - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.90 Safari/537.36

Browser: Chrome 89

Operating system: Windows 8.1

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
for	51827.5 Ops/sec
foreach	87059.5 Ops/sec
some	89683.7 Ops/sec
for..of	100658.9 Ops/sec
for..in	75994.6 Ops/sec

Website performance monitoring

Script Preparation code:

var array = new Array(100).fill(1);

Tests:

for
var j = 0; for (var i = 0; i < array.length; i++) { j += array[i]; }
foreach
var j = 0; array.forEach(function(i) { j += array[i]; });
some
var j = 0; array.some(function(i) { j += array[i]; });
for..of
var j = 0; for (var i of array) { j += array[i]; }
for..in
var j = 0; for (var i in array) { j += array[i]; }