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Run results for:
Splice vs Spread vs Unshift to insert at beginning of array (fixed from slice)
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Run details:
User agent:
Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Mobile Safari/537.36
Browser:
Chrome Mobile 130
Operating system:
Android
Device Platform:
Mobile
Date tested:
one year ago
Unshift
14K/s
Splice
9K/s
Spread
88/s
View exact numbers
Test name
Executions per second
✓
Unshift
13,628 Ops/sec
Splice
8,704 Ops/sec
Spread
88 Ops/sec
Script Preparation code:
var array = Array.from({ length: 100 }).map((val, i) => i);
Tests:
Splice
var newArray = array.splice(0, 0, 99);
Spread
var newArray = [99, ...array];
Unshift
var newArray = array.unshift(99);