Run results for: for vs for..of vs forEach - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:87.0) Gecko/20100101 Firefox/87.0

Browser: Firefox 87

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
for native	1734162.5 Ops/sec
for	551352.2 Ops/sec
forEach	542974.9 Ops/sec
some	618514.2 Ops/sec

Script Preparation code:

var array = new Array(1000);

Tests:

for native
for (var i = array.length - 1; i >= 0; i--) { array[i]; }
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]; });