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

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 dayjsNow = dayjs();
var luxonNow = luxon.DateTime.now();
var jsJodaNow = JSJoda.ZonedDateTime.now();
var now = new Date();

Tests:

Dayjs
dayjsNow.format('YYYY/MM/DD HH:mm:ss');
luxon
luxonNow.toFormat('yyyy/LL/dd HH:mm:ss');
js-joda
jsJodaNow.format(JSJoda.DateTimeFormatter.ofPattern('yyyy/MM/dd H:m:s'));
date-fns
dateFns.format(now, 'yyyy/MM/dd HH:mm:ss')

Historical Performance Data aggregated from 8 community runs

Desktop Results:

Chrome 8 runs

js-joda

1.2M/s

date-fns

372K/s

Dayjs

317K/s

luxon

278K/s

Fastest: js-joda (4.4x faster)

View exact numbers

✓ js-joda: 1,235,503 ops/sec
• date-fns: 372,105 ops/sec
• Dayjs: 316,674 ops/sec
• luxon: 278,286 ops/sec

Results show median performance across all community submissions. Run this benchmark yourself to verify on your device.

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: 9 months ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/140.0.0.0 Safari/537.36

Browser/OS: Chrome 140 on Linux

View result in a separate tab

js-joda

1.2M/s

date-fns

337K/s

luxon

267K/s

Dayjs

264K/s

View exact numbers

Test name	Executions per second
✓ js-joda	1,212,092 Ops/sec
date-fns	337,190 Ops/sec
luxon	267,310 Ops/sec
Dayjs	263,511 Ops/sec

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

LLMs can make mistakes. Check important info.

**Overview**

The provided JSON represents a JavaScript benchmarking test case on the MeasureThat.net website. The test compares the performance of four different date formatting libraries: dayjs, luxon, js-joda, and date-fns.

**Options being compared**

The options being compared are:

1. dayjs
2. luxon
3. js-joda
4. date-fns

These libraries provide different approaches to handling dates and formatting them according to various formats (e.g., YYYY/MM/DD HH:mm:ss).

**Pros and Cons of each approach**

Here's a brief overview of the pros and cons of each library:

1. **dayjs**
	* Pros: Simple, easy to use, and widely adopted.
	* Cons: Not as fast as other options, can be memory-intensive.
2. **luxon**
	* Pros: Fast, efficient, and provides more features than dayjs.
	* Cons: Steeper learning curve due to its API, may require additional setup.
3. **js-joda**
	* Pros: Similar to Java's Joda-Time library, provides a robust date formatting system.
	* Cons: Can be overkill for simple use cases, slower performance compared to luxon.
4. **date-fns**
	* Pros: Fast, modern, and widely adopted in the JavaScript community.
	* Cons: May require additional setup due to its functional programming style.

**Library descriptions**

1. **dayjs**: dayjs is a lightweight, pure JavaScript date library that provides methods for parsing, formatting, and manipulating dates. It's designed to be simple and easy to use.
2. **luxon**: luxon is a modern, open-source date library developed by the Mozilla team. It provides a more efficient and feature-rich alternative to dayjs, with support for internationalization and time zones.
3. **js-joda**: js-joda is a JavaScript port of Java's Joda-Time library. It provides a robust set of methods for working with dates and times, including formatting and parsing.
4. **date-fns**: date-fns is a modern, functional programming-style date library that provides a simple and efficient way to work with dates.

**Special JS features or syntax**

None mentioned in the provided JSON, but it's worth noting that some libraries may use special JavaScript features like async/await or Promises to handle asynchronous operations.

**Other alternatives**

If none of these options are suitable for your needs, you may want to consider other date formatting libraries like:

* Moment.js (a popular, widely adopted library)
* Internationalized Date Format (ISO 8601) standard
* A custom implementation using native JavaScript functions

Keep in mind that each library has its strengths and weaknesses, and the choice ultimately depends on your specific use case and requirements.

dayjs vs luxon vs js-joda vs date-fns (formatting) (version: 6)

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

Historical Performance Data aggregated from 8 community runs

Desktop Results:

Chrome 8 runs

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 (formatting) (version: 6)

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

Historical Performance Data aggregated from 8 community runs

Desktop Results:

Chrome 8 runs

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`