Benchmark: Moment.js string vs Date in constructor

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.22.0/moment.min.js'></script>

Tests:

String date
const date = moment('22-01-1996')
Date() date
const date = moment(new Date('22-01-1996'))

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
String date
Date() date

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36

Browser/OS: Chrome 114 on Windows

View result in a separate tab

Test name	Executions per second
String date	927186.1 Ops/sec
Date() date	1257686.8 Ops/sec

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

LLMs can make mistakes. Check important info.

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

**Overview**

The benchmark is designed to compare the performance of two ways to create a Date object using Moment.js, a popular JavaScript library for working with dates.

**Moment.js Library**

Moment.js is a lightweight library that provides a simple and intuitive way to work with dates in JavaScript. It allows you to easily parse dates from strings, perform arithmetic operations on dates, and more. The library is widely used and has a large community of users and developers who contribute to it.

In this benchmark, Moment.js is used to create Date objects using two different methods:

1. **String date**: This method uses the `moment()` function to parse a string representing a date (e.g., "22-01-1996"). The resulting Date object represents the specified date.
2. **Date() date**: This method creates a new Date object by calling the built-in JavaScript `Date` constructor and passing a string representing a date as an argument (e.g., "22-01-1996").

**Tested Options**

The benchmark compares two options:

1. **String date**: Using Moment.js to parse a string representing a date.
2. **Date() date**: Creating a new Date object using the built-in JavaScript `Date` constructor and passing a string representing a date as an argument.

**Pros and Cons of Each Approach**

* **String date (Moment.js)**:
	+ Pros: Can handle more complex date formats, including international formats.
	+ Cons: May be slower due to the overhead of parsing the string.
* **Date() date**:
	+ Pros: Typically faster than parsing a string, as it avoids the overhead of parsing.
	+ Cons: Limited by the input string format, which may not support all possible date formats.

**Other Considerations**

When working with dates in JavaScript, it's essential to consider factors like timezone awareness, daylight saving time (DST) rules, and cultural formatting. Moment.js provides a convenient way to handle these complexities, but it also introduces additional overhead due to its parsing mechanisms.

**Alternative Approaches**

If you don't want to use a library like Moment.js, you can create Date objects using the built-in JavaScript `Date` constructor or by manually parsing the date string using regular expressions. However, these approaches may not be as convenient or efficient as using a library like Moment.js.

In summary, this benchmark tests two ways to create Date objects using Moment.js and compares their performance. The choice of approach depends on your specific use case, with string date (Moment.js) offering more flexibility but potentially slower performance, and Date() date being faster but limited by the input string format.

Related benchmarks:

Moment.js string vs Date in constructor (version: 0)

Comparing performance of: String date vs Date() date

Created: one year ago by: Guest

Jump to the latest result

String date

Date() date

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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