Run results for: multiple shift vs splice

Run details:

User agent: Mozilla/5.0 (Android 14; Mobile; rv:120.0) Gecko/120.0 Firefox/120.0

Browser: Firefox Mobile 120

Operating system: Android

Device Platform: Mobile

Date tested: 2 years ago

Benchmark engine: Benchmark.js

shift

166.9M/s

splice

21.5M/s

View exact numbers

Test name	Executions per second
✓ shift	166,942,624 Ops/sec
splice	21,471,972 Ops/sec

Script Preparation code:

var arr = [];
for (i = 0; i < 1000; i++) {
    arr.push(i);
}
var arr2 = [];
arr2.push(arr.slice(0, 199))
arr2.push(arr.slice(200, 399))
arr2.push(arr.slice(400, 599))
arr2.push(arr.slice(600, 799))
arr2.push(arr.slice(800, 999))

Tests:

splice
arr.splice(0,200);
shift
arr2.shift();

Run results for: multiple shift vs splice

-

splice

shift