Run results for: luxon vs dayjs vs date-fns vs ff native temporal vs moment (formatting)

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.3.1 Safari/605.1.15

Browser: Safari 26

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 5 months ago

dayjs v1.11.13

3.2M/s

moment.js v2.29.1

1.4M/s

luxon v3.5.0

955K/s

date-fns v4.1.0

32K/s

Native Temporal (Firefox 139)

0/s

View exact numbers

Test name	Executions per second
✓ dayjs v1.11.13	3,202,962 Ops/sec
moment.js v2.29.1	1,416,334 Ops/sec
luxon v3.5.0	955,348 Ops/sec
date-fns v4.1.0	32,444 Ops/sec
Native Temporal (Firefox 139)	0 Ops/sec

HTML Preparation code:

<script src="https://cdnjs.cloudflare.com/ajax/libs/luxon/3.5.0/luxon.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/dayjs/1.11.13/dayjs.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/date-fns/4.1.0/cdn.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.29.1/moment.min.js"></script>

Script Preparation code:

window.timestamp = 1735660089
window.intlFormat = {
  year: "numeric",
  month: "2-digit",
  day: "2-digit",
  hour: "numeric",
  minute: "numeric",
  hour12: true,
}

Tests: