Benchmark: date formatter libraries test

HTML Preparation code:

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.22.1/moment.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/luxon@1.2.0/build/global/luxon.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/fecha/2.3.3/fecha.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/date-fns/1.29.0/date_fns.min.js"></script>
<script src="https://unpkg.com/dayjs"></script>
<script src="https://wzrd.in/standalone/dateformat@latest"></script>
<script src="https://wzrd.in/standalone/time-stamp@latest"></script>
<script src="https://unpkg.com/fdate"></script>

Script Preparation code:

window.__date__ = new Date();
window.__expected__ = '2000/01/06';

Tests:

3846masa/fdate
var actual = fdate`${'YYYY'}/${'MM'}/${'DD'}`(__date__); console.assert(actual === __expected__);
moment/moment
var actual = moment(__date__).format('YYYY/MM/DD'); console.assert(actual === __expected__);
moment/luxon
var actual = luxon.DateTime.fromJSDate(__date__).toFormat('yyyy/MM/dd'); console.assert(actual === __expected__);
taylorhakes/fecha
var actual = fecha.format(__date__, 'YYYY/MM/DD'); console.assert(actual === __expected__);
date-fns/date-fns
var actual = dateFns.format(__date__, 'YYYY/MM/DD'); console.assert(actual === __expected__);
xx45/dayjs
var actual = dayjs(__date__).format('YYYY/MM/DD'); console.assert(actual === __expected__);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
3846masa/fdate
moment/moment
moment/luxon
taylorhakes/fecha
date-fns/date-fns
xx45/dayjs

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark definition and test cases.

**What is being tested?**

The tests are comparing different JavaScript libraries for date formatting:

1. `fdate` (now known as `date-fns`) - formats dates using a simple syntax.
2. `moment.js` - a popular library for working with dates and times, providing a wide range of features.
3. `luxon` - a modern, lightweight alternative to moment.js, designed for high performance and ease of use.
4. `fecha` (also known as `taylorhakes/fecha`) - another date formatting library.
5. `dayjs` - a simple and fast library for working with dates.

**Options compared**

The tests are comparing the execution speed of each library when formatting a specific date string using different syntaxes.

* In the case of `fdate`, the syntax used is `${'YYYY'}/${'MM'}/${'DD'}`.
* For `moment.js`, the syntax used is `format('YYYY/MM/DD')`.
* `Luxon` uses the `toFormat` method with a format string (`yyyy/MM/dd`).
* `fecha` uses the `format` method with a format string (`YYYY/MM/DD`).
* `dayjs` uses the `format` method with a format string (`YYYY/MM/DD`).

**Pros and cons of each approach**

1. **fdate (now date-fns)**: Pros - simple syntax, fast execution. Cons - limited features compared to other libraries.
2. **moment.js**: Pros - widely adopted, feature-rich, well-maintained. Cons - slower performance compared to newer alternatives.
3. **Luxon**: Pros - modern design, high performance, easy to use. Cons - relatively new library, some users may not be familiar with it.
4. **fecha**: Pros - simple syntax, fast execution. Cons - limited features compared to other libraries, and its author is no longer actively maintaining the project.
5. **dayjs**: Pros - simple syntax, fast execution. Cons - relatively new library, some users may not be familiar with it.

**Other considerations**

* The `fdate` library has been deprecated in favor of `date-fns`, which is a more feature-rich and widely adopted alternative.
* Moment.js has a large community and ecosystem around it, but its performance can be slower than newer alternatives like Luxon and dayjs.
* Luxon and dayjs are both designed to be fast and easy to use, making them suitable for high-performance applications.

**Alternative libraries**

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

* `date-fns`: a modern, feature-rich library that builds upon the `fdate` syntax.
* `ms-dateformat`: a lightweight library that provides a simple and easy-to-use API for date formatting.
* `dateutil`: a comprehensive library for working with dates and times in JavaScript.

Keep in mind that each library has its own strengths and weaknesses, and the choice of which one to use will depend on your specific requirements and preferences.

Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 14_2_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.0.1 Mobile/15E148 Safari/604.1

Browser/OS: Mobile Safari 14 on iOS 14.2.1

View result in a separate tab

Test name	Executions per second
3846masa/fdate	335544.0 Ops/sec
moment/moment	222639.8 Ops/sec
moment/luxon	190850.5 Ops/sec
taylorhakes/fecha	268052.4 Ops/sec
date-fns/date-fns	234357.1 Ops/sec
xx45/dayjs	159059.2 Ops/sec

Related benchmarks:

date formatter libraries test (version: 0)

Comparing performance of: 3846masa/fdate vs moment/moment vs moment/luxon vs taylorhakes/fecha vs date-fns/date-fns vs xx45/dayjs

Created: 3 years ago by: Guest

Jump to the latest result

3846masa/fdate

moment/moment

moment/luxon

taylorhakes/fecha

date-fns/date-fns

xx45/dayjs

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):