Benchmark: Dayjs Date-fns format comparison 3

HTML Preparation code:

<script src="https://unpkg.com/dayjs@1.8.21/dayjs.min.js"></script>
<script src="https://igor.moomers.org/random/datefns.js"></script>

Script Preparation code:

window.ds = dayjs(new Date("2020-02-19T00:51:53.623839+00:00"));

Tests:

Date-fns
window.datefns.startOfWeek(window.ds.toDate());
Dayjs
dayjs().startOf("week")

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Date-fns
Dayjs

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

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

LLMs can make mistakes. Check important info.

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

**Overview**

The benchmark is designed to compare the performance of two libraries: Dayjs and Date-fns, specifically in terms of formatting dates. The test involves generating a date string using each library and then comparing it with another function from the same library (Date-fns).

**Options Compared**

There are two options being compared:

1. **Dayjs**: A JavaScript date manipulation library that provides methods for working with dates, including formatting.
2. **Date-fns**: Another popular JavaScript date manipulation library that offers a range of functions for working with dates, including formatting.

**Pros and Cons**

* **Dayjs**:
	+ Pros: Simple syntax, easy to use, fast execution (although this benchmark doesn't show it).
	+ Cons: May not be as feature-rich as Date-fns.
* **Date-fns**:
	+ Pros: More comprehensive set of features, flexible syntax, and better support for internationalization.
	+ Cons: Steeper learning curve due to its more complex syntax.

**Library Descriptions**

1. **Dayjs**: A lightweight JavaScript date library that provides methods for working with dates, such as formatting, parsing, and manipulating dates. Dayjs is designed to be simple and easy to use, making it a popular choice among developers.
2. **Date-fns**: Another popular JavaScript date manipulation library that offers a range of functions for working with dates, including formatting, calculating time differences, and more. Date-fns provides a flexible syntax and supports internationalization, making it suitable for complex date-related tasks.

**Special JS Features or Syntax**

The test case uses some special features in the browsers' userAgent strings to identify the browser and device type:

* `Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.3 Safari/605.1.15` indicates that this is a Safari 16 browser running on a Mac with macOS 10.15.7.

**Other Alternatives**

For date manipulation tasks in JavaScript, other alternatives to Dayjs and Date-fns include:

* **Moment.js**: A widely used date library that provides methods for working with dates, including formatting, parsing, and manipulating dates.
* **Luxon**: A modern JavaScript date library that offers a range of functions for working with dates, including formatting, calculating time differences, and more.

**Benchmark Preparation Code**

The provided script preparation code includes two scripts:

1. `dayjs.min.js`: The Dayjs library.
2. `datefns.js`: The Date-fns library.

These libraries are loaded into the browser using their respective script tags.

**Individual Test Cases**

There are two individual test cases in this benchmark:

1. **Dayjs**: This test case uses Dayjs to format a date string and compare it with another function from the same library (Date-fns).
2. **Date-fns**: This test case uses Date-fns to format a date string and compare it with another function from the same library (Date-fns).

Both test cases use the `startOfWeek` function, which returns the first day of the week for a given date.

I hope this explanation helps you understand what's being tested in this benchmark!

Related benchmarks:

Dayjs Date-fns format comparison 3 (version: 0)

Comparing performance of: Date-fns vs Dayjs

Created: 3 years ago by: Guest

Jump to the latest result

Date-fns

Dayjs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

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