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Run results for:
at(-1) vs slice(-1)[0] vs length - 1
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<iframe src="https://measurethat.net/Embed?id=495508" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36
Browser:
Chrome 120
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
2 years ago
at(-1)
35.8M/s
slice(-1)[0]
25.1M/s
length - 1
18.2M/s
View exact numbers
Test name
Executions per second
✓
at(-1)
35,847,460 Ops/sec
slice(-1)[0]
25,148,448 Ops/sec
length - 1
18,212,414 Ops/sec
Script Preparation code:
var array = Array({ length: 10000 }, (_, i) => i);
Tests:
at(-1)
array.at(-1);
length - 1
array[array.length - 1]
slice(-1)[0]
array.slice(-1)[0]