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

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:146.0) Gecko/20100101 Firefox/146.0

Browser: Firefox 146

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 4 months ago

Test name	Executions per second
for	2146777.5 Ops/sec
foreach	1712030.4 Ops/sec
for in	172581360.0 Ops/sec
for..of	453282.0 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; }