Run results for: Set Union using add vs. Native Set Union

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:145.0) Gecko/20100101 Firefox/145.0

Browser: Firefox 145

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 8 months ago

Javascript Set Union using add

3K/s

Javascript Set Union

1K/s

View exact numbers

Test name	Executions per second
✓ Javascript Set Union using add	3,213 Ops/sec
Javascript Set Union	1,318 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:

const first = new Set([...Array(10000)].map(it => String(~~(Math.random() * 10000))));
const second = new Set([...Array(10000)].map(it => String(~~(Math.random() * 200000))));

class MySet extends Set {
    union(other) {
        other.forEach(el => {
            this.add(el);
        });
        return this;
    }
}

const firstSet = new MySet(first);
const secondSet = new MySet(second);

Tests:

Javascript Set Union
first.union(second)
Javascript Set Union using add
firstSet.union(second)