Run results for: Object arrays: findIndex vs for loop (length cached)

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.36

Browser: Chrome 116

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
findIndex	1326.8 Ops/sec
for loop	714.4 Ops/sec

Script Preparation code:

var arr = new Array(15000);
arr.fill({ id: 0 });
arr = arr.map((el, idx) => el.id = idx);
var foo = Math.floor(Math.random() * 15000);

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

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

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