Run results for: for vs foreach vs for..in vs for..of - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/118.0

Browser: Firefox 118

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
for	11155155.0 Ops/sec
foreach	5648315.5 Ops/sec
for in	47016668.0 Ops/sec
for..of	732979.4 Ops/sec

Script Preparation code:

var array = new Array(100);

Tests:

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