Benchmark: date-fns vs moment addDays

HTML Preparation code:

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.29.4/moment.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/date-fns/1.9.0/date_fns.min.js"></script>

Script Preparation code:

window.__date__ = new Date();
window.__expected__ = '2021/09/26';

Tests:

moment
const momentDate = moment(__date__); const isoString = momentDate.toISOString(); const tomorrow = momentDate.add(1, 'days')
datefns
const actual = __date__.toISOString(); const tomorrow = dateFns.addDays(__date__, 1);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
moment
datefns

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36

Browser/OS: Chrome 130 on Linux

View result in a separate tab

Test name	Executions per second
moment	427639.8 Ops/sec
datefns	858569.8 Ops/sec

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

LLMs can make mistakes. Check important info.

I'll break down the provided benchmark and explain what's being tested.

**Benchmark Overview**

The benchmark compares the performance of two libraries: `date-fns` and `moment.js`. The focus is on how quickly each library can add days to a date object.

**Options Compared**

Two options are compared:

1. **Moment.js**: A popular JavaScript date manipulation library.
2. **Date-fns**: A modern, lightweight alternative to Moment.js for date-related tasks.

**Pros and Cons of Each Approach**

* **Moment.js**:
	+ Pros:
		- Well-established and widely adopted.
		- Supports various date formats and calculations.
	+ Cons:
		- Can be slower due to its complexity.
		- Requires more memory compared to Date-fns.
* **Date-fns**:
	+ Pros:
		- Lightweight (smaller size) and faster than Moment.js.
		- Designed for modern JavaScript features and performance.
	+ Cons:
		- Less feature-rich compared to Moment.js.

**Library Descriptions**

1. **Moment.js**: A popular date manipulation library that provides a wide range of functionality, including parsing dates, formatting dates, calculating time differences, and more. It's widely adopted and has a large community of users.
2. **Date-fns**: A modern alternative to Moment.js, designed for simplicity and performance. Date-fns focuses on providing the most common date-related tasks with a small footprint.

**Special JS Features or Syntax**

There are no special JavaScript features or syntax used in this benchmark that would require additional explanation.

**Other Alternatives**

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

1. **Luxon**: A modern, lightweight library that provides a wide range of date-related functionality.
2. **Day.js**: A simple and lightweight library that provides basic date arithmetic operations.
3. **Moment.js's competitor libraries**, like `date-fns` itself or the mentioned `luxon`, each with their own strengths.

Keep in mind that the choice of library depends on your specific use case, performance requirements, and personal preferences.

**Benchmark Preparation Code**

The provided benchmark preparation code sets up two date objects:

1. `window.__date__ = new Date();`: Creates a new `Date` object.
2. `window.__expected__ = '2021/09/26';`: Sets an expected date string (not used in the test).

**Individual Test Cases**

The benchmark consists of two test cases, each measuring the performance of one library:

1. **Moment.js**: Adds 1 day to the created date object using `moment(__date__)`.
2. **Date-fns**: Adds 1 day to the created date object using `dateFns.addDays(__date__, 1)`.

The benchmark measures how many executions per second each library can perform, comparing the performance of both libraries.

Related benchmarks:

date-fns vs moment addDays (version: 0)

Comparing performance of: moment vs datefns

Created: 2 years ago by: Guest

Jump to the latest result

moment

datefns

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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