Run results for: splice vs slice split array

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:145.0) Gecko/20100101 Firefox/145.0

Browser: Firefox 145

Operating system: Windows

Device Platform: Desktop

Date tested: 10 months ago

Benchmark engine: Benchmark.js

splice

232K/s

slice

163K/s

View exact numbers

Test name	Executions per second
✓ splice	231,838 Ops/sec
slice	162,645 Ops/sec

Script Preparation code:

var arr = [...Array(1000)].map((_, index) => `item-${index}`);
var SPLIT_LENGTH = 555;

Tests:

slice
const a = arr.slice(0, SPLIT_LENGTH); const b = arr.slice(SPLIT_LENGTH); console.log(a.length, b.length);
splice
const a = arr; const b = a.splice(SPLIT_LENGTH, a.length - SPLIT_LENGTH); console.log(a.length, b.length);