Run results for: lodash@4.17.21 uniq vs set vs custom unique

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36

Browser: Chrome 130

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

Custom function

9.3M/s

Array

6.9M/s

Set

4.6M/s

View exact numbers

Test name	Executions per second
✓ Custom function	9,313,008 Ops/sec
Array	6,861,213 Ops/sec
Set	4,554,063 Ops/sec

HTML Preparation code:

<script src='https://cdn.jsdelivr.net/npm/lodash@4.17.21/lodash.min.js'></script>

Script Preparation code:

function unique(array,) {
  const result = array.filter(
    (item, index, array) => array.findIndex((a) => a === item) === index,
  );
  return result.length === array.length ? array : result;
}

Tests:

Set
const l = new Set([1, 2, 3, 4, 5, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7]); return l;
Array
const l = [1, 2, 3, 4, 5, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7]; return _.uniq(l);
Custom function
const l = [1, 2, 3, 4, 5, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7]; return unique(l);