Run results for: Comparing performance of: _.uniqWith vs native impl vs _.uniqBy

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36

Browser: Chrome 123

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

lodash.uniqBy

605/s

imp

551/s

lodash.uniqWith

1/s

View exact numbers

Test name	Executions per second
✓ lodash.uniqBy	605 Ops/sec
imp	551 Ops/sec
lodash.uniqWith	1 Ops/sec

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.21/lodash.min.js'></script>

Script Preparation code:

function _uniqTxes(newSelectedModelList) {
  return newSelectedModelList.filter(function({ txid }, key) {
    return !this.has((key = txid)) && this.add(key);
  }, new Set());
}

// Build random data set with duplicates 
function randomChar() {
    return 'abcdefghijklmnopqrstuvwxyz'.charAt(Math.floor(Math.random() * 26));
}

var data = [];
for (var i = 0; i < 50000; i++) {
    data.push ({
        txid: randomChar() + randomChar() +randomChar()
    });
}

Tests:

imp
_uniqTxes(data)
lodash.uniqWith
_.uniqWith(data, (a, b) => a.txid === b.txid);
lodash.uniqBy
_.uniqBy(data, 'txid');