Run results for: for vs foreach vs some vs for..in - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.138 Safari/537.36

Browser: Chrome 81

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
for	39780.2 Ops/sec
foreach	3362721.0 Ops/sec
for..in	2732155.0 Ops/sec
for ..of	85700.3 Ops/sec

Website performance monitoring

Script Preparation code:

var array = new Array(100);

Tests:

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