Benchmark: Array.filter vs Array.splice

Script Preparation code:

const array = Array.from({length: 10_000}, () => Math.floor(Math.random() * 10_000_000));
const indexToDelete = 7500;
const deleteCount = 500;

Tests:

Array.filter
const temp = [...array]; return temp.filter((x, i) => i < indexToDelete || i >= indexToDelete + deleteCount);
Array.splice
const temp = [...array]; temp.splice(indexToDelete, deleteCount); return temp;

Rendered benchmark preparation results:

Previous results

Test case name	Result
Array.filter
Array.splice

Latest run results:

Run details: (Test run date: 6 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/144.0.0.0 Safari/537.36

Browser/OS: Chrome 144 on Mac OS X 10.15.7

Array.splice

515K/s

Array.filter

23K/s

View exact numbers

Test name	Executions per second
✓ Array.splice	515,029 Ops/sec
Array.filter	22,543 Ops/sec

Array.filter vs Array.splice (version: 1)