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Run results for:
for vs foreach vs some vs for..of vs for with cached length
Compare loop performance
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Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:140.0) Gecko/20100101 Firefox/140.0
Browser:
Firefox 140
Operating system:
Windows
Device Platform:
Desktop
Date tested:
9 months ago
Test name
Executions per second
for
20698280.0 Ops/sec
foreach
7517727.0 Ops/sec
some
12567482.0 Ops/sec
for..of
1380676.2 Ops/sec
for with cached length
19945734.0 Ops/sec
Script Preparation code:
var array = new Array(100);
Tests:
for
for (var i = 0; i < array.length; i += 1) { array[i]; }
foreach
array.forEach(function(i) { array[i]; });
some
array.some(function(i) { array[i]; });
for..of
for (var i of array) { array[i]; }
for with cached length
for (var i = 0, end = array.length; i < end; i += 1) { array[i]; }