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Run results for:
access arr element and multiply it in loops: for vs forEach vs for..in
Compare loop performance
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<iframe src="https://measurethat.net/Embed?id=580768" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (X11; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/117.0
Browser:
Firefox 117
Operating system:
Linux
Device Platform:
Desktop
Date tested:
one year ago
for
1.0M/s
foreach
113K/s
for..in
16K/s
View exact numbers
Test name
Executions per second
✓
for
1,045,575 Ops/sec
foreach
113,248 Ops/sec
for..in
16,197 Ops/sec
Script Preparation code:
var array = [...new Array(1000)].map((e, i) => i + 1);
Tests:
for
for (var i = 0; i < array.length; i++) { array[i] = array[i] * 1000; }
foreach
array.forEach((e, i) => { array[i] = e * 1000; });
for..in
for (var i in array) { array[i] = array[i] * 1000; }