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Run results for: Array.from() vs Spread operator

Array.from() vs Array.prototype.slice() vs Spread operator for duplicating an array.

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Run details:
Mozilla/5.0 (Windows NT 10.0; rv:109.0) Gecko/20100101 Firefox/118.0
Firefox 118
Windows
Desktop
one year ago
Test name Executions per second
Array.from() 712.0 Ops/sec
Array.prototype.slice() 4819.2 Ops/sec
Spread operator 722.9 Ops/sec
HTML Preparation code:
AخA
 
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<script>
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    const ArrayTemplate = Array.from(Array(100000).keys())
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</script>
Tests:

  • Array.from()

     
    const copy = Array.from(ArrayTemplate);

  • Array.prototype.slice()

     
    const copy = ArrayTemplate.slice()

  • Spread operator

     
    const copy = [...ArrayTemplate]