Run details:
Mozilla/5.0 (iPhone; CPU iPhone OS 17_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/126.0.6478.153 Mobile/15E148 Safari/604.1
Chrome Mobile iOS 126
iOS 17.5
Mobile
8 months ago
Test name Executions per second
findIndex 5131.4 Ops/sec
indexOf 512336.7 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);