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Run results for:
for vs foreach vs for..of vs for..of over entries vs for in
Compare loop performance
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=562016" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (X11; CrOS x86_64 14541.0.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.0 Safari/537.36
Browser:
Chrome 129
Operating system:
Chrome OS 14541.0.0
Device Platform:
Desktop
Date tested:
one year ago
for..of
57K/s
foreach
56K/s
for..of over entries
53K/s
for..in
29K/s
for
23K/s
View exact numbers
Test name
Executions per second
✓
for..of
57,109 Ops/sec
foreach
56,426 Ops/sec
for..of over entries
53,239 Ops/sec
for..in
28,846 Ops/sec
for
22,610 Ops/sec
Script Preparation code:
var array = Array.from({length: 100}); var t;
Tests:
for
for (let i = 0; i < array.length; i++) { t = array[i]; }
foreach
array.forEach(function(v, i) { t = v; });
for..of
for (var v of array) { t = v; }
for..of over entries
for (var [i, v] of array.entries()) { t = v; }
for..in
for (var k in array) { t = array[k]; }