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 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.4 Safari/605.1.15

Browser: Safari 15

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
for	4673.9 Ops/sec
foreach	19710.2 Ops/sec
some	750468.7 Ops/sec
for..of	5912.4 Ops/sec
reverse for	9272.3 Ops/sec
map	282966.2 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]; });