Run results for: for vs foreach vs some vs for..of vs reverse for vs map - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.5060.114 Safari/537.36

Browser: Chrome 103

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
for	6786.2 Ops/sec
foreach	774962.9 Ops/sec
some	796846.9 Ops/sec
for..of	9654.3 Ops/sec
reverse for	13455.4 Ops/sec
map	561086.8 Ops/sec

Website performance monitoring

Script Preparation code:

var array = new Array(1000);

Tests:

for
for (var i = 0; i < array.length; i++) { array[i]; }
foreach
array.forEach(function(i) { array[i]; });
some
array.some(function(i) { array[i]; });
for..of
for (var i of array) { array[i]; }
reverse for
for (var i = array.length; i >= 0 ; i--) { array[i]; }
map
array.map(function(i) { array[i]; });