Run results for: Dayjs Date-fns format and add day comparison

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_3_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.3.1 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 18

Operating system: iOS 18.3.2

Device Platform: Mobile

Date tested: one year ago

Dayjs

503K/s

Date-fns

366K/s

View exact numbers

Test name	Executions per second
✓ Dayjs	502,928 Ops/sec
Date-fns	366,304 Ops/sec

HTML Preparation code:

<script src="https://unpkg.com/dayjs@1.8.21/dayjs.min.js"></script>
<script src="https://igor.moomers.org/random/datefns.js"></script>

Script Preparation code:

window.ds = "2020-02-19T00:51:53.623839+00:00";

Tests:

Date-fns
window.datefns.parseISO(window.ds); window.datefns.format(new Date(), "mm-dd-yyyy"); window.datefns.add(new Date(), { weeks: 1 });
Dayjs
dayjs(ds) dayjs().format("MM-DD-YYYY"); dayjs().add(1, 'days');