Run results for: Union Lodash Set ObjectBased

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: 3 years ago

Test name	Executions per second
Lodash	6719.8 Ops/sec
ObjectBased	12555.5 Ops/sec
Spread	8274.3 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 = [],
    b = [],
    c = [],
    d = [],
    i;

for (i = 0; i < 1000; i++) {
    a.push(Math.floor(Math.random() * 1000) + 1);
    b.push(Math.floor(Math.random() * 1000) + 1);
}
var union = (function(){
  	return function(){
      	let ob={};
		let arr = [...arguments];
      	let len = arr.length;
		for(let i=0;i<len;i++)
          arr[i].forEach(num => ob[num] = 1);
		return Object.keys(ob);
    }
}());

Tests:

Lodash
_.union(a,b)
ObjectBased
union(a,b)
Spread
[...new Set([...a,...b])];

Run results for: Union Lodash Set ObjectBased

Lodash

ObjectBased

Spread