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

Run details:

User agent: Mozilla/5.0 (Android 15; Mobile; rv:134.0) Gecko/134.0 Firefox/134.0

Browser: Firefox Mobile 134

Operating system: Android

Device Platform: Mobile

Date tested: 3 months ago

Test name	Executions per second
luxon v3.5.0	307783.6 Ops/sec
dayjs v1.11.13	1030901.2 Ops/sec
date-fns v4.1.0	9465.6 Ops/sec
temporal-polyfill 0.2.5	9423.7 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