Run results for: find vs findIndex (Array prototype methods) 123123

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36 Edg/122.0.0.0

Browser: Chrome 122

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Array.prototype.findIndex	171.9 Ops/sec
Array.prototype.findIndex (rev)	174.0 Ops/sec

Script Preparation code:

var arr = [];
var i = 0;
var arrRev = [];
var j = 0;
var SIZE = 1E5;
var middle = Math.floor(SIZE / 2);

while (i <= SIZE) arr[i] = i++;
while (j <= SIZE) arrRev[j] = j++;

Tests:

Array.prototype.findIndex
const index = arr.findIndex(item => item == middle);
Array.prototype.findIndex (rev)
const index = arrRev.length - arrRev.reverse().findIndex(item => item == middle) - 1;

Run results for: find vs findIndex (Array prototype methods) 123123

Measuring which is faster

Array.prototype.findIndex

Array.prototype.findIndex (rev)