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Run results for:
for vs while vs for of vs forEach
Go to the benchmark
Embed
Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=611328" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:139.0) Gecko/20100101 Firefox/139.0
Browser:
Firefox 139
Operating system:
Mac OS X 10.15
Device Platform:
Desktop
Date tested:
one year ago
Benchmark engine:
Benchmark.js
for i--
2.4M/s
for i++
1.7M/s
while i--
1.1M/s
for of
475K/s
forEach
453K/s
View exact numbers
Test name
Executions per second
✓
for i--
2,400,335 Ops/sec
for i++
1,716,327 Ops/sec
while i--
1,064,038 Ops/sec
for of
475,280 Ops/sec
forEach
453,378 Ops/sec
Script Preparation code:
var arr = [] for (var i = 0; i < 1000; i++) arr[i] = i
Tests:
for i++
for (var i = 0; i < arr.length; i++) { var a = arr[i] }
for i--
for (var i = arr.length; i >= 0; i--) { var a = arr[i] }
while i--
var i = arr.length while (i--) { var a = arr[i] }
for of
for (var v of arr) { var a = v }
forEach
arr.forEach(v => { var a = v })