Run results for: Lodash Uniq vs Lodash UniqBy vs Javascript Set

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser: Chrome 131

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

Javascript Set

43K/s

Lodash Uniq

36K/s

Lodash UniqBy

5K/s

View exact numbers

Test name	Executions per second
✓ Javascript Set	42,551 Ops/sec
Lodash Uniq	35,932 Ops/sec
Lodash UniqBy	4,820 Ops/sec

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.5/lodash.min.js"></script>

Script Preparation code:

var firstEqual = [];
var secondEqual = [];

for (var i=0; i<1000; i++) {
  firstEqual.push({a: {b: {c: i}}});
  secondEqual.push({a: {b: {c: i}}});
}

var arr = [...firstEqual, ...secondEqual];

Tests:

Lodash UniqBy
_.uniqBy(arr, 'a.b.c').map(el =>el.a.b.c)
Javascript Set
[...new Set(arr.map(el => el.a.b.c))]
Lodash Uniq
_.uniq(arr.map(el => el.a.b.c))