Run results for: for vs foreach vs some vs for..of 1000 v0 - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:77.0) Gecko/20100101 Firefox/77.0

Browser: Firefox 77

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
foreach	823350.6 Ops/sec
for	161813.2 Ops/sec
for 2	384019.8 Ops/sec
for..of	16140.3 Ops/sec

Website performance monitoring

Script Preparation code:

var array = new Array(1000);

Tests:

foreach
array.forEach(function(i) { array[i]; });
for
for (var i = 0; i < array.length; i++) { array[i]; }
for 2
var length = array.length; for (var i = 0; i < length; i++) { array[i]; }
for..of
for (var i of array) { array[i]; }