Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36
Chrome 119
Windows
Desktop
one year ago
Test name Executions per second
findIndex 1933.5 Ops/sec
for loop 400.5 Ops/sec
some 906.5 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

     
    arr.findIndex((itm) => itm.id === foo);
  • for loop

     
    for (let i = 0; i < arr.length; i++) {
      if (arr[i].id === foo) break;
    }
  • some

     
    arr.some((itm) => itm.id === foo);