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)

Historical Performance Data aggregated from 211 community runs

Desktop Results:

Chrome 153 runs

datefns

863K/s

day.js

637K/s

luxon

520K/s

moment

205K/s

Fastest: datefns (4.2x faster)

View exact numbers

✓ datefns: 862,901 ops/sec
• day.js: 636,835 ops/sec
• luxon: 520,002 ops/sec
• moment: 204,951 ops/sec

Firefox 38 runs

datefns

784K/s

day.js

659K/s

luxon

402K/s

moment

191K/s

Fastest: datefns (4.1x faster)

View exact numbers

✓ datefns: 784,451 ops/sec
• day.js: 659,122 ops/sec
• luxon: 401,717 ops/sec
• moment: 190,804 ops/sec

Safari 5 runs

day.js

1.0M/s

datefns

1.0M/s

luxon

576K/s

moment

231K/s

Fastest: day.js (4.5x faster)

View exact numbers

✓ day.js: 1,031,300 ops/sec
• datefns: 1,025,199 ops/sec
• luxon: 575,671 ops/sec
• moment: 231,229 ops/sec

Mobile Results:

Chrome 8 runs

datefns

440K/s

day.js

434K/s

luxon

310K/s

moment

107K/s

Fastest: datefns (4.1x faster)

View exact numbers

✓ datefns: 439,927 ops/sec
• day.js: 433,548 ops/sec
• luxon: 310,139 ops/sec
• moment: 106,776 ops/sec

Safari 7 runs

day.js

1.3M/s

datefns

1.3M/s

luxon

646K/s

moment

268K/s

Fastest: day.js (4.7x faster)

View exact numbers

✓ day.js: 1,269,376 ops/sec
• datefns: 1,255,208 ops/sec
• luxon: 645,580 ops/sec
• moment: 267,918 ops/sec

Results show median performance across all community submissions. Run this benchmark yourself to verify on your device.

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: one month ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/151.0.0.0 Safari/537.36

Browser/OS: Chrome 151 on Mac OS X 10.15.7

View result in a separate tab

datefns

2.0M/s

day.js

1.3M/s

luxon

1.2M/s

moment

453K/s

View exact numbers

Test name	Executions per second
✓ datefns	1,986,702 Ops/sec
day.js	1,300,131 Ops/sec
luxon	1,158,559 Ops/sec
moment	453,018 Ops/sec

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

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

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

Created: 3 years ago by: Guest

Go to the latest result

datefns

luxon

moment

day.js

Historical Performance Data aggregated from 211 community runs

Desktop Results:

Chrome 153 runs

Firefox 38 runs

Safari 5 runs

Mobile Results:

Chrome 8 runs

Safari 7 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

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

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

Created: 3 years ago by: Guest

Go to the latest result

datefns

luxon

moment

day.js

Historical Performance Data aggregated from 211 community runs

Desktop Results:

Chrome 153 runs

Firefox 38 runs

Safari 5 runs

Mobile Results:

Chrome 8 runs

Safari 7 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

Related benchmarks

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