Run results for: Merge Arrays using lodash or not

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser: Chrome 120

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

merge2

3.0M/s

merge3

2.6M/s

merge1

1.1M/s

View exact numbers

Test name	Executions per second
✓ merge2	2,954,314 Ops/sec
merge3	2,639,536 Ops/sec
merge1	1,115,430 Ops/sec

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

function merge1(a, b) {
    return _.uniq(_.reject(_.concat(a, b), _.isUndefined));
}

function emptyIfUndefined(a) {
    return a || [];
}

function merge2(a, b) {
    return _.uniq([...emptyIfUndefined(a), ...emptyIfUndefined(b)]);
}

function merge3(a, b) {
    return [...new Set([...emptyIfUndefined(a), ...emptyIfUndefined(b)])];
}

Tests:

merge1
merge1([1,2],[2,3]);
merge2
merge2([1,2],[2,3]);
merge3
merge3([1,2],[2,3]);