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Run results for:
for...in/for...of declaration vs assignment
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=614484" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Safari/537.36
Browser:
Chrome 138
Operating system:
Linux
Device Platform:
Desktop
Date tested:
9 months ago
Test name
Executions per second
for...in declaration
1169.5 Ops/sec
for...in assignment
1125.0 Ops/sec
for...of declaration
805.0 Ops/sec
for...of assignment
846.4 Ops/sec
HTML Preparation code:
<!--your preparation HTML code goes here-->
Script Preparation code:
let arr = Array.from({length:300},(a,i)=>i)
Tests:
for...in declaration
for(let i in window) console.log(i)
for...in assignment
let i for(i in window) console.log(i)
for...of declaration
for(let o of arr) console.log(o)
for...of assignment
let o for(o of arr) console.log(o)