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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=622725" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (iPhone; CPU iPhone OS 18_7_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.7 Mobile/15E148 Safari/604.1
Browser:
Mobile Safari 18
Operating system:
iOS 18.7.1
Device Platform:
Mobile
Date tested:
7 months ago
Index
501.2M/s
Array.at()
461.7M/s
View exact numbers
Test name
Executions per second
✓
Index
501,214,176 Ops/sec
Array.at()
461,710,368 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];