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

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:147.0) Gecko/20100101 Firefox/147.0

Browser: Firefox 147

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 6 months ago

dayjs v1.11.13

3.3M/s

luxon v3.5.0

857K/s

temporal-polyfill 0.2.5

43K/s

date-fns v4.1.0

42K/s

View exact numbers

Test name	Executions per second
✓ dayjs v1.11.13	3,257,132 Ops/sec
luxon v3.5.0	856,661 Ops/sec
temporal-polyfill 0.2.5	42,701 Ops/sec
date-fns v4.1.0	42,066 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 Preparation code:

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

Tests:

luxon v3.5.0
var date = luxon.DateTime.fromMillis(timestamp * 1000); date.toLocaleString(intlFormat)
dayjs v1.11.13
var date = dayjs(timestamp * 1000); date.format("L LT")
date-fns v4.1.0
var date = dateFns.fromUnixTime(timestamp); dateFns.intlFormat(date, intlFormat)
temporal-polyfill 0.2.5
var instant = Temporal.Instant.fromEpochMilliseconds(timestamp * 1000) instant.toLocaleString(intlFormat)

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

Create and format dates from a timestamp

luxon v3.5.0

dayjs v1.11.13

date-fns v4.1.0

temporal-polyfill 0.2.5