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

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:141.0) Gecko/20100101 Firefox/141.0

Browser: Firefox 141

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: one year ago

dayjs v1.11.13

1.9M/s

luxon v3.5.0

626K/s

moment.js v2.29.1

599K/s

temporal-polyfill 0.2.5

33K/s

date-fns v4.1.0

31K/s

View exact numbers

Test name	Executions per second
✓ dayjs v1.11.13	1,915,391 Ops/sec
luxon v3.5.0	625,601 Ops/sec
moment.js v2.29.1	598,798 Ops/sec
temporal-polyfill 0.2.5	32,918 Ops/sec
date-fns v4.1.0	30,677 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://cdn.jsdelivr.net/npm/temporal-polyfill@0.2.5/global.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: