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Run results for:
slice VS splice VS shift: who is the fastest to split array
100k list splice and shift win, they mutate list slice loose, it creates a copy of list 7.5x slower
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Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:128.0) Gecko/20100101 Firefox/128.0
Browser:
Firefox 128
Operating system:
Windows
Device Platform:
Desktop
Date tested:
7 months ago
Test name
Executions per second
slice
7310661.5 Ops/sec
splice
8054742.0 Ops/sec
Script Preparation code:
var list = []; for (var i = 0; i < 1000 * 1000; i++) { list.push(i); }
Tests:
slice
list.push('slice'); let list2 = []; while (list.length) { list2.push(list.slice(1, 50)); list.splice(0, 50); }
splice
list.push('splice'); let list2 = []; while (list.length) { list2.push(list.splice(0, 50)); }