Run results for: Moment Dayjs Date-fns end of day comparison

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 26_4_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/148.0.7778.166 Mobile/15E148 Safari/604.1

Browser: Chrome Mobile iOS 148

Operating system: iOS 26.4.2

Device Platform: Mobile

Date tested: one month ago

Test name	Executions per second
Date-fns	1190034.8 Ops/sec
Moment	221639.4 Ops/sec
Dayjs	1051427.6 Ops/sec
Luxon	185113.3 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 src='https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.22.0/moment.min.js'></script>
<script src="https://cdn.jsdelivr.net/npm/luxon@3.4.0/build/global/luxon.min.js"></script>

Script Preparation code:

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

Tests:

Date-fns
window.datefns.endOfDay(window.datefns.parseISO(window.ds))
Moment
moment(ds).endOf('day')
Dayjs
dayjs(ds).endOf('day')
Luxon
luxon.DateTime.fromISO(ds).endOf('day')

Run results for: Moment Dayjs Date-fns end of day comparison

Date-fns

Moment

Dayjs

Luxon