Run results for: JS lastIndexOf vs indexOf

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: