Benchmark: Set vs Object vs Lodash union: Union arrays of strings

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.15/lodash.min.js"></script>

Script Preparation code:

var origNumItems = 1000000; // 1 million
var newNumItems = origNumItems * 2;
var origArr = [];
var newItems = [];

function initArray(arr, numItems) {
  for (var i = 0; i <= numItems; i++) { arr.push(`Item ${i}`); }
}

initArray(origArr, origNumItems);
initArray(newItems, newNumItems);

Tests:

Set
var s = new Set(origArr); for (const i in newItems) { s.add(i); } Array.from(s);
Object
var obj = {}; for (const i in origArr) { obj[i] = true; } for (const i in newItems) { obj[i] = true; } _.keys(obj)
Lodash union
_.union(origArr, newItems)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Set
Object
Lodash union

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.106 Safari/537.36

Browser/OS: Chrome 91 on Windows

View result in a separate tab

Test name	Executions per second
Set	0.8 Ops/sec
Object	0.6 Ops/sec
Lodash union	0.9 Ops/sec

Set vs Object vs Lodash union: Union arrays of strings (version: 0)

Union an array or 1 million items with an array of 2 million items, 1 million of which are duplicates.

Comparing performance of: Set vs Object vs Lodash union

Created: 2 years ago by: Guest

Jump to the latest result

Set

Object

Lodash union

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A