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Run results for: Corrected Lodash _.union vs native Set()

The original does not correctly create the Set object from two arrays. Added alternate tests for using the Array functions, just in case they differ from spreading.

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Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:109.0) Gecko/20100101 Firefox/118.0
Firefox 118
Mac OS X 10.15
Desktop
one year ago
Test name Executions per second
_.union 1784350.0 Ops/sec
Set() 1177155.5 Ops/sec
Set() using array spread 1028556.5 Ops/sec
Set() convert back to array 749202.8 Ops/sec
Set() convert back to array using array spread 779714.1 Ops/sec
HTML Preparation code:
AخA
 
1
<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>
Script Preparation code:
 
var a = [1, 2, 3, 4, 5]
var b = [3, 4, 5, 6, 7]
Tests:

  • _.union

     
    var c = _.union(a, b)

  • Set()

     
    var c = new Set(a.concat(b))

  • Set() using array spread

     
    var c = new Set([...a, ...b])

  • Set() convert back to array

     
    var c = new Set(a.concat(b))
    var d = Array.from(c)

  • Set() convert back to array using array spread

     
    var c = new Set([...a, ...b])
    var d = [...c]