Run results for: findIndex vs forEach

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser: Chrome 131

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

forEach

659/s

findIndex

575/s

View exact numbers

Test name	Executions per second
✓ forEach	659 Ops/sec
findIndex	575 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);
arr = arr.filter((value, index, self) => self.indexOf(value) === index)

Tests:

findIndex
const index = arr.findIndex((itm) => itm.id === foo); arr.splice(index,1);
forEach
arr.forEach((value, index) => { if (value.id === foo) { arr.splice(index, 1); } });

Run results for: findIndex vs forEach

compare performance of findIndex and forEach in removing the first result in an array

findIndex

forEach