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Run results for:
Var vs Let vs Const Performance II
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<iframe src="https://measurethat.net/Embed?id=563084" 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/129.0.0.0 Safari/537.36
Browser:
Chrome 129
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
Let
2/s
Const
2/s
Var
2/s
View exact numbers
Test name
Executions per second
✓
Let
2 Ops/sec
✓
Const
2 Ops/sec
✓
Var
2 Ops/sec
Script Preparation code:
var numbers = Array.from({ length: 10_000_000 }, (v, i) => i);
Tests:
Var
for (let i = 0; i < numbers.length; i++) { var number = numbers[i]; }
Let
for (let i = 0; i < numbers.length; i++) { let number = numbers[i]; }
Const
for (let i = 0; i < numbers.length; i++) { const number = numbers[i]; }