Benchmark: luxon vs datefns vs moment vs dayjs (formatting)

HTML Preparation code:

<script src="https://cdnjs.cloudflare.com/ajax/libs/dayjs/1.10.7/dayjs.min.js" integrity="sha512-bwD3VD/j6ypSSnyjuaURidZksoVx3L1RPvTkleC48SbHCZsemT3VKMD39KknPnH728LLXVMTisESIBOAb5/W0Q==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/luxon/2.3.0/luxon.min.js" integrity="sha512-2j5fkjQ4q5ceXgfxi+kqrU2Oz234MrpyywZsQz1F5OGnfat7mOhjRr0oz5cpQ+YwwWB+hhDBSyxNGuL/tKWMFw==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/date-fns/1.30.1/date_fns.min.js" referrerpolicy="no-referrer"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.29.1/moment.min.js" integrity="sha512-qTXRIMyZIFb8iQcfjXWCO8+M5Tbc38Qi5WzdPOYZHIlZpzBHG3L3by84BBBOiRGiEb7KKtAOAs5qYdUiZiQNNQ==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>

Script Preparation code:

window.__date__ = new Date();
window.__luxon__ = luxon.DateTime.fromJSDate(__date__);
window.__moment__ = moment(__date__);
window.__dayjs__ = dayjs(__date__);

Tests:

datefns
dateFns.format(__date__, 'YYYY/MM/DD');
luxon
__luxon__.toFormat('yyyy/MM/dd');
moment
__moment__.format('YYYY/MM/DD');
dayjs
__dayjs__.format('YYYY/MM/DD');

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
datefns
luxon
moment
dayjs

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36 Edg/131.0.0.0

Browser/OS: Chrome 131 on Windows

View result in a separate tab

moment

2.1M/s

luxon

1.2M/s

datefns

1.1M/s

dayjs

533K/s

View exact numbers

Test name	Executions per second
✓ moment	2,141,271 Ops/sec
luxon	1,152,270 Ops/sec
datefns	1,053,706 Ops/sec
dayjs	532,869 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks and explore what's being tested in this particular benchmark.

**Overview**

The provided JSON represents a benchmark that compares the performance of four different date formatting libraries: Luxon, Date-fns, Moment.js, and Day.js. The test is designed to measure the execution time of each library when formatting dates using specific formats (YYYY/MM/DD).

**Test Cases**

Each test case consists of a single benchmark definition in JSON format, which specifies the date value and the format string to be used for testing. There are four test cases:

1. `dateFns.format(__date__, 'YYYY/MM/DD');`: Uses the Date-fns library.
2. `__luxon__.toFormat('yyyy/MM/dd');`: Uses Luxon.
3. `__moment__.format('YYYY/MM/DD');`: Uses Moment.js.
4. `__dayjs__.format('YYYY/MM/DD');`: Uses Day.js.

**Library and Purpose**

Here's a brief overview of each library:

1. **Date-fns**: A lightweight, modular date formatting library that aims to be highly performant and flexible.
2. **Luxon**: A modern date and time library developed by Pimkroese, which provides a robust set of features for working with dates and times in JavaScript.
3. **Moment.js**: A widely used, popular JavaScript library for working with dates and times, known for its ease of use and extensive feature set.
4. **Day.js**: A lightweight, fast, and highly performant date formatting library that's gaining popularity.

**Options Compared**

The test compares the performance of each library when formatting dates using specific formats:

* `YYYY/MM/DD` (Year/Month/Day)
* `yyyy/MM/dd` (Year/Month/Day, with lowercase year)

The options being compared are essentially the same in terms of format string, but differ in implementation and syntax.

**Pros and Cons**

Here's a brief pros and cons analysis for each library:

1. **Date-fns**:
	* Pros: Highly performant, modular, and flexible.
	* Cons: May require more setup and configuration than other libraries.
2. **Luxon**:
	* Pros: Robust feature set, high performance, and modern architecture.
	* Cons: Steeper learning curve due to its functional programming style.
3. **Moment.js**:
	* Pros: Extremely popular, extensive feature set, and easy to use.
	* Cons: May be slower than other libraries due to its complexity and overhead.
4. **Day.js**:
	* Pros: Highly performant, lightweight, and easy to use.
	* Cons: Less features compared to other libraries.

**Special JS Features or Syntax**

None of the libraries mentioned in this benchmark use special JavaScript features or syntax that require a deep understanding of modern JavaScript programming concepts. However, if you're interested in exploring these features, you can look into topics like:

* Arrow functions
* Classes and prototypes
* Async/await
* Promises

**Alternatives**

If you're looking for alternative date formatting libraries, here are some options to consider:

1. **Date.js**: Another lightweight date library that's gaining popularity.
2. **Moment-Timezone**: An extension of Moment.js that provides support for timezones and other advanced features.
3. **ms**: A small, fast, and highly performant date library developed by the creators of Date-fns.

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

luxon vs datefns vs moment vs dayjs (formatting) (version: 0)

Comparing performance of: `datefns vs luxon vs moment vs dayjs`

Created: 4 years ago by: Guest

Go to the latest result

datefns

luxon

moment

dayjs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

luxon vs datefns vs moment vs dayjs (formatting) (version: 0)

Comparing performance of: datefns vs luxon vs moment vs dayjs

Created: 4 years ago by: Guest

Go to the latest result

datefns

luxon

moment

dayjs

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: `datefns vs luxon vs moment vs dayjs`