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Run results for:
Direct Array Access vs. New Local Constant Variable in A Loop v.2
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=533709" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:95.0) Gecko/20100101 Firefox/95.0
Browser:
Firefox 95
Operating system:
Windows
Device Platform:
Desktop
Date tested:
2 years ago
Benchmark engine:
Benchmark.js
Local Variable Access
4K/s
Direct Array Access
348/s
View exact numbers
Test name
Executions per second
✓
Local Variable Access
3,908 Ops/sec
Direct Array Access
348 Ops/sec
Script Preparation code:
var arr = [ { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, { "key": "value" }, ] var newarr1 = [] var newarr2 = []
Tests:
Local Variable Access
for (var i = 0; i < arr.length; i++) { const el = arr[i] for (var j = 0; j < 100; j++) newarr2.push(el) }
Direct Array Access
for (var i = 0; i < arr.length; i++) { for (var j = 0; j < 100; j++) newarr2.push(arr[i]) }