Run details:
Mozilla/5.0 (iPhone; CPU iPhone OS 17_5_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/15E148 [LinkedInApp]/9.29.7597
Mobile Safari 17
iOS 17.5.1
Mobile
9 months ago
Test name Executions per second
findIndex 2398.3 Ops/sec
indexOf 248056.3 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);