Benchmark: Lodash _.union vs native Set() vs Concat & filter

HTML Preparation code:

<script type="text/javascript" src="https://cdn.jsdelivr.net/npm/lodash@4.17.10/lodash.min.js"></script>

Script Preparation code:

var a = [1, 2, 3, 4, 5]
var b = [3, 4, 5, 6, 7]
Array.prototype.cfunion = function (array) {
  var conc = this.concat(array);
  return conc.filter((i,p)=>{
    return conc.indexOf(i) == p
  });
};

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)
Concat & Filter
var c = a.cfunion(b)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
_.union
Set()
Set() convert back to array
Concat & Filter

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 23 days ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36

Browser/OS: Chrome 123 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
_.union	4142536.0 Ops/sec
Set()	6545209.0 Ops/sec
Set() convert back to array	4605968.0 Ops/sec
Concat & Filter	5824937.0 Ops/sec

Lodash _.union vs native Set() vs Concat & filter (version: 0)

Comparing performance of: _.union vs Set() vs Set() convert back to array vs Concat & Filter

Created: 5 years ago by: Guest

Jump to the latest result

_.union

Set()

Set() convert back to array

Concat & Filter

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A