Run results for: Object arrays: findIndex vs for loop

Run details:

User agent: Mozilla/5.0 (Linux; Android 11; SAMSUNG SM-G975W) AppleWebKit/537.36 (KHTML, like Gecko) SamsungBrowser/15.0 Chrome/90.0.4430.210 Mobile Safari/537.36

Browser: Chrome Mobile 90

Operating system: Android

Device Platform: Mobile

Date tested: 2 years ago

Test name	Executions per second
findIndex	434.7 Ops/sec
for loop	167.4 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);

Tests:

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

Run results for: Object arrays: findIndex vs for loop

Testing finding an object array via findIndex or by using a for loop

findIndex

for loop