Run details:
Mozilla/5.0 (iPhone; CPU iPhone OS 18_1_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/134.0.6998.33 Mobile/15E148 Safari/604.1
Chrome Mobile iOS 134
iOS 18.1.1
Mobile
10 days ago
Test name Executions per second
findIndex 1283023.9 Ops/sec
indexOf 150556656.0 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);