Run results for: for (cached length) vs foreach vs some - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:60.0) Gecko/20100101 Firefox/60.0

Browser: Firefox 60

Operating system: Windows 7

Device Platform: Desktop

Date tested: 6 years ago

Test name	Executions per second
for	1914513.5 Ops/sec
foreach	4669764.5 Ops/sec
some	4452345.5 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(item, index) { return item; });
some
array.some(function(item, index) { return item === array[index]; });

;