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Run results for:
Var vs Let
Just a simple test with var/let performance in for loop
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<iframe src="https://measurethat.net/Embed?id=623085" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (iPhone; CPU iPhone OS 18_7 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.3 Mobile/15E148 Safari/604.1
Browser:
Mobile Safari 26
Operating system:
iOS 18.7
Device Platform:
Mobile
Date tested:
7 months ago
var
3K/s
let
3K/s
View exact numbers
Test name
Executions per second
✓
var
2,802 Ops/sec
let
2,610 Ops/sec
Tests:
var
for(var i=1;i<=1000;i++) console.log(i);
let
for(let i=1;i<=1000;i++) console.log(i);