Benchmark: moment vs datefns format f2

HTML Preparation code:

<script src="https://cdnjs.cloudflare.com/ajax/libs/date-fns/1.29.0/date_fns.min.js"></script>
<script src="https://cdn.rawgit.com/moment/moment/2.7.0/moment.js"></script>
<script src="https://cdn.rawgit.com/moment/moment-timezone/0.2.2/builds/moment-timezone-with-data.js"></script>

Script Preparation code:

var date = new Date()

Tests:

moment
moment(date.valueOf()).format("YYYY-MM-DD")
datefns
dateFns.format(date, 'YYYY-MM-DD')
date
var date2 = new Date(date.getTime()) date2.getYear()+"-"+date2.getMonth()+"-"+date2.getDate()

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
moment
datefns
date

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 27 days ago):

LLMs can make mistakes. Check important info.

Let's dive into the explanation of the provided benchmark.

**Overview**

The benchmark is designed to compare the performance of three JavaScript libraries: Moment.js, date-fns, and a custom implementation using built-in JavaScript features. The goal is to measure which library is the most efficient when it comes to formatting dates in different formats.

**Test Cases**

There are three test cases:

1. **Moment**: Measures the time taken by Moment.js to format a date object into a string in the format "YYYY-MM-DD".
2. **datefns**: Measures the time taken by date-fns to format a date object into a string in the same format.
3. **Custom (Date)**: Measures the time taken by a custom implementation using built-in JavaScript features to format a date object into a string in the same format.

**Library Descriptions**

* **Moment.js**: A popular JavaScript library for working with dates and times. It provides a simple and intuitive API for formatting dates, as well as other features like date parsing and timezone support.
* **date-fns**: A modern JavaScript library for working with dates and times. It provides a simple and efficient API for formatting dates, as well as other features like date parsing and timezone support.

**Custom Implementation**

The custom implementation uses built-in JavaScript features to format a date object into a string in the format "YYYY-MM-DD". This implementation is likely using a combination of the `toISOString()` method, which returns a string representing the date in UTC time, followed by some string manipulation to extract the desired components (year, month, day).

**Options Compared**

The benchmark compares three options:

* **Moment.js**: Uses its built-in formatting functions to format the date object.
* **date-fns**: Uses its `format()` function to format the date object.
* **Custom (Date)**: Uses built-in JavaScript features to format the date object.

**Pros and Cons of Each Approach**

Here are some pros and cons of each approach:

* **Moment.js**:
	+ Pros: Well-established library with a large community, wide range of formatting options.
	+ Cons: Can be slow for simple formatting tasks, has a larger memory footprint due to its complexity.
* **date-fns**:
	+ Pros: Modern and efficient API, fast performance, small memory footprint.
	+ Cons: Less established than Moment.js, fewer formatting options available out-of-the-box.
* **Custom (Date)**:
	+ Pros: Fast and lightweight, can be customized to meet specific requirements.
	+ Cons: Requires manual implementation of formatting logic, may not be as efficient or readable as other approaches.

**Other Considerations**

When choosing a library for date and time formatting, consider the following factors:

* **Performance**: If speed is critical, date-fns may be the best choice. For more complex formatting tasks, Moment.js may offer more options.
* **Readability**: If code readability is important, Moment.js or date-fns may be a better fit due to their well-established APIs and documentation.
* **Customization**: If specific requirements cannot be met by existing libraries, a custom implementation using built-in JavaScript features may be necessary.

**Alternatives**

If you're not interested in using Moment.js or date-fns, other alternatives for date and time formatting include:

* **Intl.DateTimeFormat**: A part of the ECMAScript Internationalization API that provides a simple and efficient way to format dates and times.
* **JavaScript Date APIs**: Built-in JavaScript features like `toISOString()` and string manipulation can be used to format dates.

Keep in mind that these alternatives may not offer the same level of flexibility or performance as Moment.js or date-fns.

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:93.0) Gecko/20100101 Firefox/93.0

Browser/OS: Firefox 93 on Windows

View result in a separate tab

Test name	Executions per second
moment	390472.6 Ops/sec
datefns	600952.9 Ops/sec
date	5462600.5 Ops/sec

Related benchmarks:

moment vs datefns format f2 (version: 0)

Comparing performance of: moment vs datefns vs date

Created: 3 years ago by: Guest

Jump to the latest result

moment

datefns

date

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 27 days ago):