Run results for: FindIndex(real findIndex) + splice vs filter

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.5845.967 YaBrowser/23.9.1.967 Yowser/2.5 Safari/537.36

Browser: Yandex Browser 23

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
FindIndex + splice	2350.0 Ops/sec
filter	22623616.0 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 + splice
var index = arr.findIndex((el) => el === foo); var newArr = arr.splice(index, 1);
filter
var index = arr.filter(el => el !== foo)

Run results for: FindIndex(real findIndex) + splice vs filter

FindIndex + splice

filter