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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=581220" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/132.0.0.0 Safari/537.36
Browser:
Chrome 132
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
one year ago
foreach
147K/s
for..of
146K/s
for
145K/s
for..of over entries
141K/s
for..in
125K/s
View exact numbers
Test name
Executions per second
✓
foreach
146,518 Ops/sec
for..of
146,186 Ops/sec
for
145,444 Ops/sec
for..of over entries
141,054 Ops/sec
for..in
124,981 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]; }