Benchmark: Dayjs Date-fns format comparison25151dd

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 = "2020-02-19T00:51:53.623839+00:00";

Tests:

Date-fns
dayjs().format("ss")
Dayjs
dayjs().get("seconds")

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:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36

Browser/OS: Chrome 121 on Mac OS X 10.15.7

View result in a separate tab

Dayjs

3.9M/s

Date-fns

722K/s

View exact numbers

Test name	Executions per second
✓ Dayjs	3,916,819 Ops/sec
Date-fns	722,130 Ops/sec

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

LLMs can make mistakes. Check important info.

I'll break down the provided benchmark JSON and explain what's being tested, compared, and the pros/cons of each approach.

**Benchmark Definition JSON**

The benchmark definition consists of two test cases:

1. `dayjs().format("ss")` - This tests the `format()` method of the Day.js library, which is used to format dates in a specific way.
2. `dayjs().get("seconds")` - This tests the `get()` method of the Day.js library, which is used to extract specific parts of a date.

**Library and Purpose**

* **Day.js**: A lightweight JavaScript library for working with dates and times. It provides methods like `format()`, `get()`, and others to perform various date-related operations.
* **Date-fns**: A popular JavaScript library for working with dates and times, providing similar functionality to Day.js.

**Options Compared**

The benchmark compares the performance of two libraries: Day.js and Date-fns. Specifically:

1. `format()` vs. `get()`: Both methods are used to extract or format date values, but they have different approaches:
	* `Day.js format()` takes a string template as an argument, which is then replaced with the formatted date value.
	* `Date-fns get()` takes a string key (like "seconds") and returns the corresponding value from the date object.
2. Native JavaScript vs. Library Functions: The benchmark also compares the performance of native JavaScript methods (`get()`) against library functions (`format()`, `get()`).

**Pros and Cons**

* **Native JavaScript` get()`**: Pros:
	+ Fastest execution time
	+ No dependency on a library or additional code
* Cons:
	+ Limited functionality compared to library methods
	+ May not provide the same level of formatting options as library functions
* `Day.js format()` and `Date-fns get()`: Pros:
	+ More flexible formatting options with template strings (Day.js) or string keys (Date-fns)
	+ Can handle more complex date calculations
* Cons:
	+ Slower execution times compared to native JavaScript `get()`
	+ May require additional code or dependency on a library

**Other Considerations**

* **Browser Support**: Both libraries are widely supported by modern browsers, but Day.js has better support for older browsers.
* **Code Size and Complexity**: Library functions can add complexity and increase code size, which may impact performance. Native JavaScript methods are often more concise and efficient.
* **Maintainability and Updates**: Libraries require updates and maintenance, which can lead to version conflicts or security issues if not managed properly.

**Alternatives**

If you prefer native JavaScript for date-related operations:

1. Use the `Date` object directly (e.g., `new Date().getSeconds()`).
2. Employ utility functions like `Date.prototype.toISOString()`, `Date.prototype.getTime()`, etc.

For more advanced date calculations and formatting, consider using:

1. Moment.js: A popular JavaScript library for working with dates and times.
2. Luxon: Another lightweight JavaScript library for date and time manipulation.

Ultimately, the choice between native JavaScript methods, Day.js, Date-fns, or other libraries depends on your specific use case, performance requirements, and personal preference.

Dayjs Date-fns format comparison25151dd (version: 0)

Comparing performance of: `Date-fns vs Dayjs`

Created: 2 years ago by: Guest

Go to the latest result

Date-fns

Dayjs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

Dayjs Date-fns format comparison25151dd (version: 0)

Comparing performance of: Date-fns vs Dayjs

Created: 2 years ago by: Guest

Go to the latest result

Date-fns

Dayjs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

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Comparing performance of: `Date-fns vs Dayjs`