Run results for: for vs foreach vs for..in vs for..of - forkfork - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:109.0) Gecko/20100101 Firefox/118.0

Browser: Firefox 118

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
for	13507.6 Ops/sec
foreach	9444.9 Ops/sec
for in	85470912.0 Ops/sec
for..of	1896.8 Ops/sec
arr cached	15083.4 Ops/sec

Script Preparation code:

var array = new Array(100000);

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]; }
arr cached
var len = array.length; for (var i = 0; i < len; i++) { array[i]; }

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