Benchmark: dayjs vs luxon vs js-joda vs date-fns (comparing)

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/dayjs@1.11.9/dayjs.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/luxon@3.4.3/build/global/luxon.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/@js-joda/core@5.5.3/dist/js-joda.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/date-fns/1.9.0/date_fns.min.js"></script>

Script Preparation code:

var dayjsDate1 = dayjs('2022-09-01T00:00:00+09:00');
var dayjsDate2 = dayjs('2023-09-01T00:00:00+09:00');
var luxonDate1 = luxon.DateTime.fromISO("2022-09-01T00:00:00+09:00");
var luxonDate2 = luxon.DateTime.fromISO("2023-09-01T00:00:00+09:00");
var jsJodaDate1 = JSJoda.ZonedDateTime.parse('2022-09-01T00:00:00+09:00', JSJoda.DateTimeFormatter.ISO_OFFSET_DATE_TIME);
var jsJodaDate2 = JSJoda.ZonedDateTime.parse('2023-09-01T00:00:00+09:00', JSJoda.DateTimeFormatter.ISO_OFFSET_DATE_TIME);
var date1 = new Date('2022-09-01T00:00:00+09:00');
var date2 = new Date('2023-09-01T00:00:00+09:00');

Tests:

Dayjs
dayjsDate1.isBefore(dayjsDate2);
luxon
luxonDate1 < luxonDate2
js-joda
jsJodaDate1.isBefore(jsJodaDate2);
date-fns
dateFns.isBefore(date1, date2);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Dayjs
luxon
js-joda
date-fns

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser/OS: Chrome 131 on Mac OS X 10.15.7

View result in a separate tab

js-joda

23.9M/s

date-fns

18.0M/s

luxon

9.2M/s

Dayjs

2.4M/s

View exact numbers

Test name	Executions per second
✓ js-joda	23,913,684 Ops/sec
date-fns	17,986,768 Ops/sec
luxon	9,240,845 Ops/sec
Dayjs	2,431,580 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

LLMs can make mistakes. Check important info.

Let's break down what's being tested in this benchmark.

**Benchmark Definition**

The benchmark is comparing the performance of four date and time libraries: Dayjs, Luxon, js-joda, and date-fns. The comparison is done by performing a simple "is before" check on two dates.

**Options Compared**

Each library has its own way of representing and manipulating dates:

1. **Dayjs**: A lightweight, JavaScript-only library that provides a modern alternative to the traditional Date class.
2. **Luxon**: A powerful, modern date and time library developed by the same team as Moment.js. It's designed for performance and ease of use.
3. **js-joda**: A Java-based library (not specifically designed for JavaScript) that uses the Joda-Time API. It's been ported to JavaScript, but it may not be as efficient or easy to use as the other options.
4. **date-fns**: A smaller, more lightweight library developed by Dan Abramov. It provides a simple and intuitive API for working with dates.

**Pros and Cons of Each Approach**

1. **Dayjs**:
	* Pros: Lightweight, easy to use, fast execution times.
	* Cons: May not be as robust or feature-rich as other libraries.
2. **Luxon**:
	* Pros: Modern, powerful API, excellent performance, support for various date formats and timezones.
	* Cons: Larger library size compared to Dayjs, may require more setup.
3. **js-joda**:
	* Pros: Robust, feature-rich API (thanks to its Joda-Time roots), fast execution times.
	* Cons: May be harder to learn and use due to its Java-based origins, larger library size.
4. **date-fns**:
	* Pros: Lightweight, easy to use, simple and intuitive API.
	* Cons: Limited features compared to the other options.

**Special JS Features or Syntax**

None are explicitly mentioned in this benchmark.

**Library Descriptions**

1. **Dayjs**: A JavaScript-only library that provides a modern alternative to traditional Date objects. It's designed for performance and ease of use, with features like automatic timezone detection and support for various date formats.
2. **Luxon**: A powerful, modern date and time library developed by the Moment.js team. It provides an excellent API for working with dates, including support for various date formats, timezones, and date arithmetic.
3. **js-joda**: A Java-based library (not specifically designed for JavaScript) that uses the Joda-Time API. It's been ported to JavaScript, but it may not be as efficient or easy to use as the other options.
4. **date-fns**: A lightweight, JavaScript-only library developed by Dan Abramov. It provides a simple and intuitive API for working with dates, including support for various date formats and date arithmetic.

**Alternatives**

If you're looking for alternative libraries, some options include:

1. **Moment.js**: A popular JavaScript library for working with dates and times (although it's been somewhat overshadowed by Dayjs and Luxon).
2. **Date-fiddle**: A lightweight, simple library that provides a basic API for working with dates.
3. **date-parser**: A library specifically designed for parsing date strings.

Keep in mind that the choice of library ultimately depends on your specific use case and performance requirements.

dayjs vs luxon vs js-joda vs date-fns (comparing) (version: 3)

Comparing performance of: `Dayjs vs luxon vs js-joda vs date-fns`

Created: 2 years ago by: Registered User

Go to the latest result

Dayjs

luxon

js-joda

date-fns

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

dayjs vs luxon vs js-joda vs date-fns (comparing) (version: 3)

Comparing performance of: Dayjs vs luxon vs js-joda vs date-fns

Created: 2 years ago by: Registered User

Go to the latest result

Dayjs

luxon

js-joda

date-fns

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

Related benchmarks

Comparing performance of: `Dayjs vs luxon vs js-joda vs date-fns`