Run results for: for vs for backwards vs for each vs some vs for..of - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/141.0.0.0 Safari/537.36

Browser: Chrome 141

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 6 months ago

Test name	Executions per second
for	9581017.0 Ops/sec
foreach	11342826.0 Ops/sec
some	11053922.0 Ops/sec
for..of	1818913.2 Ops/sec
for backwards	9403799.0 Ops/sec

Script Preparation code:

var array = new Array(100);

Tests:

for
const len = array.length; for (var i = 0; i < len; 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]; }
for backwards
for (var i = array.length; i >= 0; i--) { array[i]; }