Run results for: Array filtering: (splice + predefined index) vs (filter) - small array

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

splice

11.1M/s

filter

3.9M/s

View exact numbers

Test name	Executions per second
✓ splice	11,149,829 Ops/sec
filter	3,870,210 Ops/sec

Script Preparation code:

var arr1 = new Array(100).fill(0);
var arr2 = new Array(100).fill(0);
var indexesToDelete = [3, 10, 40, 60, 70, 90];

indexesToDelete.forEach(index => {
	arr1[index] = 1;
  	arr2[index] = 1;
});

Tests:

splice
indexesToDelete.forEach(index => { arr1.splice(index, 1); });
filter
const newArr = arr2.filter(value => value !== 1);