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Run results for:
Var vs Let v2
Just a simple test with var/let performance in for loop
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<iframe src="https://measurethat.net/Embed?id=494934" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36
Browser:
Chrome 120
Operating system:
Windows
Device Platform:
Desktop
Date tested:
2 years ago
Test name
Executions per second
var
111.0 Ops/sec
let
112.3 Ops/sec
var2
113.2 Ops/sec
let2
107.6 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);
var2
var i = 1; for(i;i<=1000;i++) console.log(i);
let2
let i = 1; for(i;i<=1000;i++) console.log(i);