Benchmark: Offset Delta - MeasureThat.net

HTML Preparation code:

<script src="https://cdn.rawgit.com/moment/moment/2.7.0/moment.js"></script>

Script Preparation code:

var today = new Date();
var minuteInMs = 60 * 1000;
var dayInMs = 24 * 60 * 60 * 1000;
var getOffsetDeltaMs = (a, b) => {
  const aOffset = new Date(a).getTimezoneOffset();
  const bOffset = new Date(b).getTimezoneOffset();
  return (aOffset - bOffset) * minuteInMs;
};

Tests:

Moment
moment(today).add(1, "days").valueOf()
Dates
today + dayInMs + getOffsetDeltaMs(today + dayInMs, today)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Moment
Dates

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 break down the provided JSON and explain what's being tested, compared, and the pros and cons of different approaches.

**Benchmark Definition**

The benchmark definition is a JavaScript function that measures the performance of two specific use cases:

1. `moment(today).add(1, "days").valueOf()` - This test case uses the Moment.js library to perform date arithmetic.
2. `today + dayInMs + getOffsetDeltaMs(today + dayInMs, today)` - This test case performs complex date calculations using built-in JavaScript functions.

**Script Preparation Code**

The script preparation code sets up variables and defines a helper function `getOffsetDeltaMs`. This function calculates the difference in timezone offsets between two dates.

```javascript
const aOffset = new Date(a).getTimezoneOffset();
const bOffset = new Date(b).getTimezoneOffset();
return (aOffset - bOffset) * minuteInMs;
```

**Html Preparation Code**

The HTML preparation code includes a script tag that loads the Moment.js library from a CDN.

```html
<script src="https://cdn.rawgit.com/moment/moment/2.7.0/moment.js"></script>
```

**Individual Test Cases**

There are two test cases:

1. **Moment**: This test case measures the performance of `moment(today).add(1, "days").valueOf()`.
2. **Dates**: This test case measures the performance of `today + dayInMs + getOffsetDeltaMs(today + dayInMs, today)`.

**Comparison**

The benchmark compares the execution time of each test case across different browsers and devices. The goal is to determine which approach performs better in terms of execution speed.

**Approach Comparison**

There are two main approaches:

1. **Moment.js**: This library provides a convenient way to perform date arithmetic, but it comes with a performance cost.
	* Pros: Easy to use, efficient for simple date calculations.
	* Cons: Can be slow for complex calculations, adds overhead due to dependency on another library.
2. **Built-in JavaScript functions**: This approach uses native JavaScript functions to perform date calculations.
	* Pros: Fast, lightweight, and doesn't add any dependencies.
	* Cons: May require more manual effort and can be less readable.

**Special JS Features/Syntax**

There are no special JavaScript features or syntax used in this benchmark. The code is straightforward and easy to understand for developers familiar with JavaScript.

**Other Alternatives**

If you're interested in exploring alternative approaches, here are some options:

1. **Lodash**: A popular utility library that provides a `date` module with various date-related functions.
2. **Date-fns**: A lightweight JavaScript date library that provides efficient and readable date manipulation functions.
3. **Custom implementation**: You can also implement your own date calculations using native JavaScript functions, as shown in the **Dates** test case.

Keep in mind that these alternatives may have their own trade-offs in terms of performance, readability, and dependencies.

Related benchmarks:

Offset Delta (version: 0)

Comparing performance of: Moment vs Dates

Created: 3 years ago by: Guest

Jump to the latest result

Moment

Dates

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):