Benchmark: moment vs date-fns date math

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

Tests:

moment
var actual = moment(__date__).add(365, 'days');
date-fns
var actual = dateFns.addDays(__date__, 365);

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

Latest run results:

Run details: (Test run date: 10 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Safari/537.36

Browser/OS: Chrome 138 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
moment	533591.8 Ops/sec
date-fns	1872240.9 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.

**What is being tested?**

The provided JSON represents two test cases for comparing the performance of two popular date libraries: Moment.js and Date-fns. The test aims to determine which library can add and subtract days from a given date (`__date__`) the fastest.

**Options compared**

Two approaches are being compared:

1. **Moment.js**: A widely-used JavaScript library for working with dates, times, and durations.
2. **Date-fns**: A lightweight, modern JavaScript library for working with dates and times.

Both libraries offer different features and performance characteristics. Moment.js is known for its feature-rich API, while Date-fns focuses on simplicity and speed.

**Pros and Cons of each approach**

**Moment.js**

Pros:

* Feature-rich API with a wide range of date and time operations
* Well-established community and extensive documentation

Cons:

* Can be slower than Date-fns due to its larger codebase and more complex algorithms
* May have higher memory usage compared to Date-fns

**Date-fns**

Pros:

* Lightweight and fast, making it suitable for high-performance applications
* Simple and intuitive API with a focus on speed and efficiency

Cons:

* Smaller community and limited documentation compared to Moment.js
* Fewer features and less flexibility in the API

**Library-specific considerations**

In this benchmark, both libraries use JavaScript's `Date` object internally. However, each library has its own implementation details and optimizations.

Moment.js uses a combination of arithmetic operations and lookups in an internal data structure to perform date calculations. This approach can be slower than Date-fns' simpler arithmetic-based implementation.

**Special JS feature or syntax**

None mentioned explicitly, but it's worth noting that both libraries use JavaScript's built-in `Date` object, which is not specific to these libraries. However, the way each library interacts with this object and performs calculations may differ.

**Other alternatives**

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

* Luxon: A modern JavaScript library for working with dates and times, known for its simplicity and performance.
* Day.js: A lightweight JavaScript library for working with dates and times, focused on speed and ease of use.
* js-joda: A Java-based library for working with dates and times in JavaScript, offering a robust API and high-performance capabilities.

Keep in mind that the choice of date library ultimately depends on your specific project requirements and performance needs.

Related benchmarks:

moment vs date-fns date math (version: 0)

Which date library can add and subtract days the fastest?

Comparing performance of: moment vs date-fns

Created: 4 years ago by: Guest

Jump to the latest result

moment

date-fns

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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