Run results for: !!find vs findIndex != -1

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/97.0.4692.71 Safari/537.36

Browser: Chrome 97

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Array.prototype.find	699.6 Ops/sec
Array.prototype.findIndex	702.8 Ops/sec

Script Preparation code:

var arr = [];
var i = 0;

while (i <= 1E5) arr[i] = i++;

Tests:

Array.prototype.find
const found = !!arr.find(item => item == 1E5);
Array.prototype.findIndex
const found = arr.findIndex(item => item == 1E5) != -1;