Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:96.0) Gecko/20100101 Firefox/96.0
Firefox 96
Mac OS X 10.15
Desktop
3 years ago
Test name Executions per second
findIndex 41515.0 Ops/sec
indexOf 153809.8 Ops/sec
Script Preparation code:
AخA
 
var arr = new Array(15000);
arr.fill({ id: 0 });
arr = arr.map((el, idx) => el.id = idx);
var foo = Math.floor(Math.random() * 15000);
Tests:
  • findIndex

     
    var index = arr.findIndex((num) => num === foo);
  • indexOf

     
    var index = arr.indexOf(foo);