Run results for: Object arrays: findIndex vs for loop with logging

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.183 Safari/537.36

Browser: Chrome 86

Operating system: Mac OS X 10.13.6

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
findIndex	772.6 Ops/sec
for loop	336.0 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
const idx = arr.findIndex((itm) => itm.id === foo); console.log(idx)
for loop
for (let i = 0; i < arr.length; i++) { if (arr[i].id === foo) { console.log(i) break; } }