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Run results for:
for vs foreach vs for..in vs for..of vs for cached 2
Compare loop performance
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Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
Browser:
Chrome 124
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
Test name
Executions per second
for
6004.5 Ops/sec
foreach
1005220.6 Ops/sec
for in
898200.4 Ops/sec
for..of
537560.9 Ops/sec
for cached
19849.6 Ops/sec
Script Preparation code:
var array = new Array(1000);
Tests:
for
for (var i = 0; i < array.length; i++) { array[i]; }
foreach
array.forEach(function(e) { e; });
for in
for (var e in array) { e; }
for..of
for (var e of array) { e; }
for cached
const arrayLength = array.length; for (var i = 0; i < arrayLength; i++) { array[i]; }