Run results for: uniqBy performance

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/82.0.4051.0 Safari/537.36 Edg/82.0.425.3

Browser: Chrome 82

Operating system: Windows

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
lodash	1480587.5 Ops/sec
javascript	1931498.6 Ops/sec

HTML Preparation code:

<script>https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.15/lodash.core.js</script>

Script Preparation code:

var data = [{a: 1}, {a: 2}, {a: 3}, {a: 4}, {a: 5}, {a: 6}, {a: 7}, {a: 8}, {a: 1}];

Tests:

lodash
_.uniqBy(data, 'a');
javascript
const sortBy = (key) => { return (a, b) => (a[key] > b[key]) ? 1 : (b[key] > a[key] ? -1 : 0); }; const uniqBy = (arr, a) => { arr.sort(sortBy(a)); const arr1 = []; arr1.push(arr[0]); for (let index = 1; index < arr.length; index++) { if (arr[index-1] && arr[index -1].a !== arr[index].a) { arr1.push(arr[index]); } } return arr1; } uniqBy(data, 'a')