Run results for: lodash unionWith vs Set for merging without duplicates test 2

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/109.0.0.0 Safari/537.36

Browser: Chrome 109

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Set&map	2648091.0 Ops/sec
unionWith2	102155.9 Ops/sec

HTML Preparation code:

<script src='https://cdn.jsdelivr.net/npm/lodash@4.17.10/lodash.min.js'></script>

Tests:

Set&map
var first = [ {'id': 2, 'FirstName': 'Jim'}, {'id': 4, 'FirstName': 'Tom'}, {'id': 5, 'FirstName': 'George'} ]; var second = [ {'id': 2, 'FirstName': 'Jim'}, {'id': 7, 'FirstName': 'Tom'}, {'id': 8, 'FirstName': 'George'} ]; const ids = new Set( [...first.map((identifiedFile) => identifiedFile.id)] ); second.forEach((identifiedFile) => { if (!ids.has(identifiedFile.id)) first.push(identifiedFile); }); return first
unionWith2
var first = [ {'id': 2, 'FirstName': 'Jim'}, {'id': 4, 'FirstName': 'Tom'}, {'id': 5, 'FirstName': 'George'} ]; var second = [ {'id': 2, 'FirstName': 'Jim'}, {'id': 7, 'FirstName': 'Tom'}, {'id': 8, 'FirstName': 'George'} ]; return _.unionWith(first, second, _.isEqual);