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Run results for:
JS lastIndexOf vs indexOf
JS lastIndexOf vs indexOf
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Run details:
User agent:
Mozilla/5.0 (X11; Linux x86_64; rv:147.0) Gecko/20100101 Firefox/147.0
Browser:
Firefox 147
Operating system:
Linux
Device Platform:
Desktop
Date tested:
3 months ago
Test name
Executions per second
Array.lastIndexOf
45430460.0 Ops/sec
Array.indexOf
11175.6 Ops/sec
Script Preparation code:
var str = ''; var i = 0; while (i <= 1E5) str += `${i++}`;
Tests:
Array.lastIndexOf
const item = str.lastIndexOf(1E5);
Array.indexOf
const index = str.indexOf(1E5);