Run results for: for vs foreach vs for..in vs for..of jul 2025 - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:145.0) Gecko/20100101 Firefox/145.0

Browser: Firefox 145

Operating system: Linux

Device Platform: Desktop

Date tested: 5 months ago

Test name	Executions per second
for	1574301.0 Ops/sec
foreach	1140243.6 Ops/sec
for in	40866568.0 Ops/sec
for..of	231183.9 Ops/sec

Script Preparation code:

var array = new Array(1000);

Tests:

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