Run results for: Unique Lodash vs Set

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.116 Safari/537.36

Browser: Chrome 83

Operating system: Windows

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
Lodash	13825.2 Ops/sec
Set Spread based	18096.0 Ops/sec
Set ArrayFrom based	17053.3 Ops/sec
Object Based Unique	16375.4 Ops/sec

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

var a = [],i;
for (i = 0; i < 1000; i++) 
    a.push(Math.floor(Math.random() * 1000) + 1);

var unique = (function(){
  let keys = Object.keys;
  return function(arr){
    let ob = {};
    let len = arr;
    let retArr=[];
    for(let i=0;i<len;i++){
      if(ob[arr[i]] === undefined){
     	ob[arr[i]]=1;
        retArr.push(arr[i]);
      }
    }
    return retArr;
  }
}());

Tests:

Lodash
_.uniq(a)
Set Spread based
[... new Set(a)]
Set ArrayFrom based
Array.from(new Set(a))
Object Based Unique
unique(a)

Run results for: Unique Lodash vs Set

Lodash

Set Spread based

Set ArrayFrom based

Object Based Unique