Benchmark: luxon vs datefns vs moment vs day.js

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/luxon@1.26.0/build/global/luxon.min.js"></script>
<script src="https://igor.moomers.org/random/datefns.js"></script>
<script src='https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.22.0/moment.min.js'></script>
<script src='https://cdnjs.cloudflare.com/ajax/libs/dayjs/1.11.7/dayjs.min.js'></script>

Script Preparation code:

window.ds = "2020-02-19T00:51:53.623839+00:00";

Tests:

datefns
window.datefns.parseISO(window.ds)
luxon
luxon.DateTime.fromISO(ds);
moment
moment(ds)
day.js
dayjs(ds)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
datefns
luxon
moment
day.js

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: yesterday)

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.2 Mobile/15E148 Safari/604.1

Browser/OS: Mobile Safari 18 on iOS 18.2

View result in a separate tab

Test name	Executions per second
datefns	1182265.1 Ops/sec
luxon	636768.4 Ops/sec
moment	253109.6 Ops/sec
day.js	1261051.6 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided JSON benchmark and explain what's being tested.

**Benchmark Purpose**

The benchmark is designed to compare the performance of four different libraries for parsing ISO dates:

1. Luxon
2. Datefns
3. Moment.js
4. Day.js

These libraries are popular choices for working with dates in JavaScript, but they have varying levels of performance and feature sets.

**Library Descriptions**

Here's a brief overview of each library:

1. **Luxon**: Developed by Matt Wilcox, Luxon is a modern date library that aims to be fast, reliable, and easy to use. It provides a simple API for working with dates and times.
2. **Datefns**: Created by Igor Mozgovoy, Datefns is another popular date library that offers a wide range of features, including parsing ISO dates. It's known for its high performance and simplicity.
3. **Moment.js**: Moment.js is a well-established date library that has been around since 2009. It provides a comprehensive set of features for working with dates and times, but can be slower than newer libraries like Luxon and Datefns.
4. **Day.js**: Developed by Nick Stinson, Day.js is a relatively new library that aims to provide fast and reliable date parsing. It's designed to be easy to use and integrate with other libraries.

**Benchmark Options**

In this benchmark, the four libraries are compared using the same input data (`window.ds`), which represents an ISO date string in the format "YYYY-MM-DDTHH:MM:SS.SSSZ". The testing options are:

1. **Parsing**: Each library is tested for parsing performance by executing the corresponding benchmark definition code (e.g., `luxon.DateTime.fromISO(ds)`).
2. **Comparison**: The libraries are compared based on their execution time, measured in executions per second.

**Pros and Cons**

Here's a brief summary of the pros and cons of each library:

1. **Luxon**:
	* Pros: Fast, reliable, easy to use.
	* Cons: Limited features compared to other libraries.
2. **Datefns**:
	* Pros: High performance, simple API, wide range of features.
	* Cons: Some users may find the API less intuitive than Luxon's.
3. **Moment.js**:
	* Pros: Comprehensive feature set, well-established.
	* Cons: Can be slower than newer libraries like Luxon and Datefns.
4. **Day.js**:
	* Pros: Fast and reliable, easy to use.
	* Cons: Limited features compared to other libraries.

**Special Considerations**

In this benchmark, there are no special JavaScript features or syntax being tested beyond the basic date parsing functionality of each library.

**Other Alternatives**

If you're looking for alternative libraries, here are a few options:

1. **Fiscal.js**: A modern date and time library that aims to be fast and reliable.
2. **js-joda**: A Java-inspired date library for JavaScript that provides a comprehensive feature set.
3. **dateutil**: A lightweight date library that provides basic date parsing functionality.

These libraries may offer different trade-offs in terms of performance, features, and ease of use, so it's worth exploring them if you're looking for alternatives to Luxon, Datefns, Moment.js, or Day.js.

Related benchmarks:

luxon vs datefns vs moment vs day.js (version: 0)

Comparing performance of: datefns vs luxon vs moment vs day.js

Created: one year ago by: Guest

Jump to the latest result

datefns

luxon

moment

day.js

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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