Benchmark: avith find first last of week

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/dayjs@1/dayjs.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/dayjs@1/locale/ja.js"></script>

Tests:

native week first last
const base = new Date() const firstDate = (new Date(base)).setDate(base.getDate() - base.getDay()); const lastDate = (new Date(base)).setDate(base.getDate() + (7 - (base.getDay() + 1)));
dayjs week first last
const base = new dayjs() const firstDate = base.startOf('week'); const lastDate = base.endOf('week');

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
native week first last
dayjs week first last

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

This benchmark does not have any results yet. Be the first one to run it!

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

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks and explore what's being tested in this specific benchmark.

**What is being tested?**

The provided JSON represents two individual test cases that measure the performance difference between using native JavaScript methods versus the popular library Day.js to find the first and last day of a week.

**Native JavaScript approach:**

The first test case uses native JavaScript methods:
```javascript
const base = new Date()
const firstDate = (new Date(base)).setDate(base.getDate() - base.getDay())
const lastDate = (new Date(base)).setDate(base.getDate() + (7 - (base.getDay() + 1)))
```
This approach relies on the `Date` object's properties and methods, such as `getDate()` to get the day of the month, `setDate()` to set a new date, and `getDay()` to get the day of the week (0 = Sunday, 6 = Saturday).

**Pros:**

* No external dependencies required
* Simple and straightforward implementation

**Cons:**

* Performance may be slower due to the overhead of setting dates manually
* Not as efficient as using specialized libraries like Day.js

**Day.js approach:**

The second test case uses Day.js:
```javascript
const base = new dayjs()
const firstDate = base.startOf('week')
const lastDate = base.endOf('week')
```
Day.js is a popular JavaScript library for working with dates and times. It provides an easy-to-use API for calculating various date-related values.

**Pros:**

* Performance may be faster due to optimized native code
* Easier to read and maintain than native JavaScript implementation

**Cons:**

* Requires an external dependency (the Day.js library)
* May not be suitable for all use cases or edge scenarios

**Library comparison:**

In this benchmark, we can see that both approaches have their pros and cons. The native JavaScript approach is simpler but potentially slower, while the Day.js approach is more efficient but requires an external dependency.

**Special JS feature/syntax:**

There doesn't appear to be any special JavaScript features or syntax used in these test cases beyond basic date arithmetic. However, it's worth noting that some modern browsers may support newer features like `Date.prototype.startOf()` and `Date.prototype.endOf()`, which are similar to the native methods used in this benchmark.

**Other alternatives:**

For calculating dates and times, other libraries and approaches could be considered:

* Moment.js: A popular JavaScript library for working with dates and times.
* Luxon: A modern date and time library that provides an easy-to-use API.
* NativeDate: Some browsers have introduced a `NativeDate` object, which can provide efficient date arithmetic.

Ultimately, the choice of approach depends on the specific requirements of your project, such as performance, simplicity, or external dependencies.

Related benchmarks:

avith find first last of week (version: 0)

Comparing performance of: native week first last vs dayjs week first last

Created: 2 years ago by: Registered User

Jump to the latest result

native week first last

dayjs week first last

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):