Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36
Chrome 131
Windows
Desktop
4 months ago
Test name Executions per second
_.union 5411672.0 Ops/sec
Set() 15265948.0 Ops/sec
Set() convert back to array 11734937.0 Ops/sec
Set union 12829269.0 Ops/sec
HTML Preparation code:
AخA
 
1
<script type="text/javascript" src="https://cdn.jsdelivr.net/npm/lodash@4.17.10/lodash.min.js"></script>
Script Preparation code:
x
 
var a = [1, 2, 3, 4, 5]
var b = [3, 4, 5, 6, 7]
var as = new Set(a)
var bs = new Set(b)
Tests:
  • _.union

     
    var c = _.union(a, b)
  • Set()

     
    var c = new Set(a, b)
  • Set() convert back to array

     
    var c = new Set(a, b)
    var d = Array.from(c)
  • Set union

     
    var c = as.union(bs)