Benchmark: luxon-v-Intl format, luxon-v-Date native parse

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/luxon@2.0.2/build/global/luxon.min.js"></script>

Script Preparation code:

window.__dateISO__ = '2021-09-24T07:36:51+0000'
window.__date__ = new Date(__dateISO__);
window.__expected__ = '09/24/2021';
window.__intlFormatter = new Intl.DateTimeFormat('en', {
  year: '2-digit',
  month: '2-digit',
  day: '2-digit',
});

Tests:

moment/luxon - format
var actual = luxon.DateTime.fromJSDate(__date__).toLocaleString(); console.assert(actual === __expected__);
Intl - format
var actual = window.__intlFormatter.format(__date__); console.assert(actual === __expected__);
moment/luxon - parse
var actual = luxon.DateTime.fromISO(__dateISO__).toJSDate(); console.assert(__date__.getTime() === actual.getTime());
Native parse
var actual = new Date(__dateISO__); console.assert(__date__.getTime() === actual.getTime());

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
moment/luxon - format
Intl - format
moment/luxon - parse
Native parse

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser/OS: Chrome 131 on Mac OS X 10.15.7

View result in a separate tab

Native parse

8.9M/s

moment/luxon - parse

632K/s

Intl - format

262K/s

moment/luxon - format

187K/s

View exact numbers

Test name	Executions per second
✓ Native parse	8,922,743 Ops/sec
moment/luxon - parse	632,285 Ops/sec
Intl - format	261,724 Ops/sec
moment/luxon - format	186,604 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 benchmark and explain what is being tested.

**Overall Purpose:**
The test cases measure the performance of different approaches to parse and format dates using JavaScript libraries.

**Test Cases:**

1. **luxon DateTime.fromJSDate()**: Tests the parsing of a date object from a JavaScript Date instance.
2. **Intl - format**: Tests the formatting of a date object using the Intl.DateTimeFormat API.
3. **moment/luxon - parse**: Tests the parsing of an ISO-formatted string into a JavaScript Date instance (using both Luxon and Moment.js).
4. **Native parse**: Tests the direct parsing of an ISO-formatted string into a JavaScript Date instance.

**Options Compared:**

* Luxon DateTime.fromJSDate() vs. Intl.DateTimeFormat API
* Luxon DateTime.fromISO() vs. Native parse
* Moment.js vs. Luxon for parsing ISO-formatted strings

**Pros and Cons:**

1. **Luxon DateTime.fromJSDate() vs. Intl.DateTimeFormat API**:
	* Luxon is a popular, actively maintained library with good performance.
	* Intl.DateTimeFormat provides a more flexible way to format dates, but may be slower due to the complexity of the formatting options.
2. **Luxon DateTime.fromISO() vs. Native parse**:
	* Luxon's fromISO method is faster and more efficient than parsing an ISO-formatted string directly.
	* Direct parsing can lead to precision issues if not done correctly (e.g., handling timezones).
3. **Moment.js vs. Luxon for parsing ISO-formatted strings**:
	* Moment.js is a well-established library, but its performance may not be as good as Luxon's.
	* Luxon is generally considered more lightweight and efficient.

**Library Descriptions:**

1. **Luxon**: A modern, open-source date and time library that provides a simple and consistent API for working with dates and times. It includes features like parsing and formatting of various date formats, handling of timezones, and support for internationalization.
2. **Intl.DateTimeFormat**: The Internationalized Locales API in JavaScript, which allows developers to format dates according to the user's locale settings.

**Special JS Features/Syntax:**

1. **JSR-310 (ISO-formatted strings)**: A Java Standard Edition (SE) specification that defines a set of date and time formats, including ISO 8601. The test cases use this standard for formatting dates.
2. **Intl.DateTimeFormat options**: The Intl.DateTimeFormat API allows developers to customize the formatting options, such as the locale, year, month, and day styles.

**Other Alternatives:**

* Other JavaScript libraries for working with dates and times, such as Day.js or date-fns.
* Native JavaScript APIs like Date and RegExp, which can be used for simple date manipulation but may not offer the same level of functionality as dedicated libraries like Luxon.

luxon-v-Intl format, luxon-v-Date native parse (version: 0)

Comparing performance of: `moment/luxon - format vs Intl - format vs moment/luxon - parse vs Native parse`

Created: 4 years ago by: Guest

Go to the latest result

moment/luxon - format

Intl - format

moment/luxon - parse

Native parse

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

luxon-v-Intl format, luxon-v-Date native parse (version: 0)

Comparing performance of: moment/luxon - format vs Intl - format vs moment/luxon - parse vs Native parse

Created: 4 years ago by: Guest

Go to the latest result

moment/luxon - format

Intl - format

moment/luxon - parse

Native parse

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: `moment/luxon - format vs Intl - format vs moment/luxon - parse vs Native parse`