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Run results for:
Array.at vs index (last element)
Measures performance between using arr.at(-1) to access the last element in the array and arr[arr.length - 1]
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<iframe src="https://measurethat.net/Embed?id=603694" 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/136.0.0.0 Safari/537.36 Edg/136.0.0.0
Browser:
Chrome 136
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
Index
38.5M/s
Array.at()
35.2M/s
View exact numbers
Test name
Executions per second
✓
Index
38,458,108 Ops/sec
Array.at()
35,173,564 Ops/sec
Script Preparation code:
const arr = Array(1000000).fill(0).map((_, i) => i)
Tests:
Array.at()
const val = arr.at(-1);
Index
const val = arr[arr.length - 1];