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Run results for:
const vs var vs let performance in loop
const vs var vs let performance in loop
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<iframe src="https://measurethat.net/Embed?id=561905" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:131.0) Gecko/20100101 Firefox/131.0
Browser:
Firefox 131
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
Benchmark engine:
Benchmark.js
Let
15K/s
Var
15K/s
Const
13K/s
View exact numbers
Test name
Executions per second
✓
Let
15,030 Ops/sec
Var
14,796 Ops/sec
Const
13,210 Ops/sec
Tests:
Var
var tmp; for(var i = 0;i < 250000;i++) { tmp = i * (i - 1) * (i + 1); }
Const
for(var i = 0;i < 250000;i++) { const tmp = i * (i - 1) * (i + 1); }
Let
let tmp; for(var i = 0;i < 250000;i++) { tmp = i * (i - 1) * (i + 1); }