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:141.0) Gecko/20100101 Firefox/141.0

Browser: Firefox 141

Operating system: Linux

Device Platform: Desktop

Date tested: 9 months ago

Test name	Executions per second
for	682752.4 Ops/sec
foreach	661161.3 Ops/sec
for in	34468448.0 Ops/sec
for..of	133040.1 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; }