Benchmark: luxon vs datefns vs moment vs new Date2

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 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)
new Date
new Date(ds)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
datefns
luxon
moment
new Date

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks.

**What is being tested?**

The provided benchmark compares four different libraries for parsing ISO-formatted dates: Luxon, Datefns, Moment.js, and `new Date`. The test cases are designed to measure the performance of each library in parsing a specific date string (`2020-02-19T00:51:53.623839+00:00`).

**Options being compared**

The four libraries being compared have different approaches to parsing dates:

1. **Luxon**: Luxon is a modern JavaScript date and time library that provides an intuitive API for working with dates. It uses a parsing algorithm that takes into account various timezone offsets, daylight saving rules, and formatting options.
2. **Datefns**: Datefns is another popular date and time library that offers a simple and efficient way to work with dates. Its parsing algorithm focuses on simplicity and speed, often sacrificing some precision over more complex libraries like Luxon.
3. **Moment.js**: Moment.js is a well-established library for working with dates in JavaScript. It provides a wide range of features, including parsing, formatting, and timezone handling. However, its parsing algorithm can be less efficient than Luxon's or Datefns'.
4. **new Date**: The `new Date` constructor is a built-in JavaScript function that creates a new date object from a string representation of a date. While it provides basic functionality, its parsing capabilities are limited compared to the other libraries.

**Pros and Cons**

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

* **Luxon**:
	+ Pros: Precise parsing, flexible timezone handling, modern API.
	+ Cons: Steeper learning curve, potentially slower performance due to added complexity.
* **Datefns**:
	+ Pros: Simple and efficient parsing, fast execution times.
	+ Cons: Less precise than Luxon, limited timezone options.
* **Moment.js**:
	+ Pros: Wide range of features, well-established community support.
	+ Cons: Parsing performance may be slower due to added complexity.
* **new Date**:
	+ Pros: Built-in JavaScript function, easy to use.
	+ Cons: Limited parsing capabilities, less flexible than other libraries.

**Libraries and their purpose**

1. **Luxon**: Luxon is a modern JavaScript date and time library that provides an intuitive API for working with dates. It's designed for high-performance parsing and provides a wide range of features, including timezone handling.
2. **Datefns**: Datefns is another popular date and time library that offers a simple and efficient way to work with dates. Its primary focus is on speed and ease of use.
3. **Moment.js**: Moment.js is a well-established library for working with dates in JavaScript. It provides a wide range of features, including parsing, formatting, and timezone handling.
4. **new Date**: The `new Date` constructor is a built-in JavaScript function that creates a new date object from a string representation of a date.

**Special JS feature or syntax**

None mentioned.

**Alternatives**

If you're interested in exploring alternative libraries for date and time parsing, some popular options include:

* **Day.js**: A lightweight JavaScript library for working with dates and times.
* **Date-Parse**: A simple JavaScript library for parsing dates from strings.
* **MSheets**: A Google Sheets plugin that provides a range of date and time functions.

Keep in mind that each library has its strengths and weaknesses, and the choice ultimately depends on your specific use case and requirements.

Latest run results:

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

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 16_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.1 Mobile/15E148 Safari/604.1

Browser/OS: Mobile Safari 16 on iOS 16.1

View result in a separate tab

Test name	Executions per second
datefns	942181.8 Ops/sec
luxon	514209.1 Ops/sec
moment	206316.3 Ops/sec
new Date	8868606.0 Ops/sec

Related benchmarks:

luxon vs datefns vs moment vs new Date2 (version: 0)

Comparing performance of: datefns vs luxon vs moment vs new Date

Created: one year ago by: Guest

Jump to the latest result

datefns

luxon

moment

new Date

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):