Benchmark: Dayjs Date-fns format comparison 5

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

Tests:

Date-fns
window.datefns.startOfWeek(window.ds);
Dayjs
window.ds.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

Autogenerated LLM Summary (model llama3.2:3b, generated 28 days ago):

LLMs can make mistakes. Check important info.

Let's dive into the benchmark and explain what's being tested.

**Benchmark Definition**

The benchmark is comparing two libraries: Day.js and Date-fns, specifically their `startOfWeek` functions for formatting dates.

**Options Compared**

Two options are compared:

1. **Date-fns**: The implementation provided by the author of the Date-fns library.
2. **Dayjs**: A JavaScript date library that provides various date and time utilities, including the `startOfWeek` function.

**Pros and Cons**

* **Date-fns**:
	+ Pros: May be optimized for specific use cases or performance-critical functions like `startOfWeek`.
	+ Cons: May not be as widely adopted or well-maintained as other libraries.
* **Dayjs**:
	+ Pros: Widely used, actively maintained, and has a large community of developers contributing to its development.
	+ Cons: Might have overhead due to its extensive feature set.

**Library Purpose**

* **Date-fns**: A lightweight JavaScript library for working with dates and times. It provides various functions for formatting, parsing, and manipulating dates.
* **Dayjs**: A fast and efficient date library that aims to provide a simple and intuitive API for date and time operations.

**Special JS Feature or Syntax**

None mentioned in this benchmark.

**Benchmark Preparation Code**

The preparation code sets up the environment by:

1. Loading Day.js and Date-fns libraries.
2. Creating two `Date` objects using the `new Date()` constructor, which is a simple way to represent dates in JavaScript.

**Other Alternatives**

If you're looking for alternatives to Date-fns or Dayjs, consider these options:

* **Luxon**: A modern date and time library that provides a wide range of features and is known for its performance.
* **Moment.js**: A widely used date and time library that offers many features, including formatting and manipulation functions.

Keep in mind that the choice of library ultimately depends on your specific needs, performance requirements, and personal preferences.

Latest run results:

Run details: (Test run date: 3 months ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36 OPR/112.0.0.0

Browser/OS: Opera 112 on Linux

View result in a separate tab

Test name	Executions per second
Date-fns	2266486.0 Ops/sec
Dayjs	1379229.1 Ops/sec

Related benchmarks:

Dayjs Date-fns format comparison 5 (version: 0)

Comparing performance of: Date-fns vs Dayjs

Created: one year ago by: Guest

Jump to the latest result

Date-fns

Dayjs

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 28 days ago):