Run results for: JS unshift vs slice

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:121.0) Gecko/20100101 Firefox/121.0

Browser: Firefox 121

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

Unshift

404.5M/s

Slice

49K/s

View exact numbers

Test name	Executions per second
✓ Unshift	404,514,176 Ops/sec
Slice	48,988 Ops/sec

Script Preparation code:

var arr1 = [];
for(i=0; i<10000; i++){arr1.push(i);}
var arr2 = [];
for(i=0; i<10000; i++){arr2.push(i);}

Tests: