Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.67 Safari/537.36
Chrome 101
Windows
Desktop
2 years ago
Test name Executions per second
findIndex 10542.4 Ops/sec
indexOf 669744.4 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);