Benchmark: moment vs date-fns parsing

HTML Preparation code:

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.29.1/moment.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/date-fns/1.30.1/date_fns.min.js"></script>

Script Preparation code:

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

Tests:

moment
var actual = moment(__date__).format('YYYY/MM/DD'); console.assert(actual === __expected__);
date-fns
var actual = dateFns.format(__date__, 'YYYY/MM/DD'); console.assert(actual === __expected__);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
moment
date-fns

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 25 days ago):

LLMs can make mistakes. Check important info.

Let's dive into the benchmark and explain what's being tested.

**Benchmark Overview**

The benchmark compares the performance of two JavaScript libraries: Moment.js (Moment) and Date-fns (Date-fns). The test case measures the time it takes for each library to parse a date string and format it into a specific format ("YYYY/MM/DD").

**Options Compared**

In this benchmark, only two options are being compared:

1. **Moment.js**: A popular JavaScript library for working with dates.
2. **Date-fns**: A lightweight and modern alternative to Moment.js.

**Pros and Cons of Each Approach**

Both libraries have their strengths and weaknesses:

* **Moment.js**:
	+ Pros: Widely used, well-documented, and has a large community. It's also easy to use for basic date manipulation.
	+ Cons: Can be slow, especially for complex date calculations, due to its reliance on V8's internal parsing logic.
* **Date-fns**:
	+ Pros: Fast, lightweight, and modern. It provides a more functional programming style, making it easier to compose date-related functions.
	+ Cons: Smaller community compared to Moment.js, which might make it harder to find answers to specific questions.

**Library Purpose**

In this benchmark, both libraries are used for parsing dates and formatting them into strings. However:

* **Moment.js**: Is designed to work with the V8 JavaScript engine's internal parsing logic, making it well-suited for complex date calculations.
* **Date-fns**: Provides a more declarative approach to working with dates, allowing developers to focus on the desired outcome rather than the implementation details.

**Special JS Feature or Syntax**

The benchmark doesn't explicitly use any special JavaScript features or syntax. However, using libraries like Moment.js and Date-fns can be considered as using specific programming paradigms (object-oriented for Moment.js and functional for Date-fns).

**Other Alternatives**

For date manipulation in JavaScript, other popular alternatives to Moment.js and Date-fns include:

* **Lux.js**: A lightweight alternative to Moment.js that provides a more functional programming style.
* **Day.js**: A modern library that provides a simple and consistent API for working with dates and times.

Overall, the benchmark highlights the performance differences between two widely used libraries in JavaScript. While both libraries have their strengths and weaknesses, Date-fns appears to be faster and more lightweight in this specific test case.

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:109.0) Gecko/20100101 Firefox/114.0

Browser/OS: Firefox 114 on Mac OS X 10.15

View result in a separate tab

Test name	Executions per second
moment	58935.6 Ops/sec
date-fns	131676.3 Ops/sec

Related benchmarks:

moment vs date-fns parsing (version: 0)

It's not a deep validation; I'm just comparing ONE function that those two libraries have in common.

Comparing performance of: moment vs date-fns

Created: one year ago by: Guest

Jump to the latest result

moment

date-fns

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 25 days ago):