Run results for: findIndex vs forEach

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36

Browser: Chrome 134

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

forEach

121.1M/s

findIndex

50.3M/s

View exact numbers

Test name	Executions per second
✓ forEach	121,075,096 Ops/sec
findIndex	50,282,768 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