Benchmark: Date JS VS MomentJS - isValid

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/moment@2.29.4/moment.min.js"></script>

Script Preparation code:

const isoDateFormatRegExp = /^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\.\d{3}Z$/;

Tests:

Date JS
const dateString = new Date().toISOString(); let isValid; if (!isoDateFormatRegExp.test(dateString)) { isValid = false; } isValid = !isNaN(new Date(dateString).getTime());
MomentJS
moment(new Date().toISOString(), 'YYYY-MM-DDTHH:mm:ss.SSSZ', true).isValid()

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Date JS
MomentJS

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 9 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Safari/537.36

Browser/OS: Chrome 138 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Date JS	829078.9 Ops/sec
MomentJS	119127.0 Ops/sec

Autogenerated LLM Summary (model gpt-4o-mini, generated 9 months ago):

LLMs can make mistakes. Check important info.

The benchmark titled "Date JS VS MomentJS - isValid" compares the performance of two methods for validating date strings in JavaScript: the native Date object method and the Moment.js library.

### Options Compared

1. **Date JS**:
   - **Benchmark Definition**: This implementation first creates an ISO date string using `new Date().toISOString()`. Then it checks if the string matches a specific regular expression to validate the format. Finally, it validates the date by converting the ISO string back into a Date object and checking if the time value is NaN (not a number).
   - **Performance**: The results show that this method can execute approximately 829,079 times per second.

2. **MomentJS**:
   - **Benchmark Definition**: This method uses Moment.js to validate the same date string. It creates a Moment object using the ISO string and checks if it's valid using `isValid()`. The specific format provided is `'YYYY-MM-DDTHH:mm:ss.SSSZ'`, and the third argument set to `true` enforces strict parsing.
   - **Performance**: This approach runs approximately 119,127 times per second.

### Pros and Cons

#### Date JS
**Pros**:
- No dependencies: This approach is based on the native JavaScript Date object, which is built-in and does not require additional libraries.
- High Performance: As demonstrated in the benchmark, this method is significantly faster in terms of execution speed, making it a better choice for scenarios that require high performance.

**Cons**:
- Complexity: The manual validation with regex and `NaN` checks introduces complexity that can lead to potential errors if not handled properly.
- Locale and format support: The native Date object may have inconsistencies in date formats across different environments.

#### MomentJS
**Pros**:
- Simplicity: Moment.js provides a simple API for date manipulation and validation, making code easier to read and maintain.
- Extensive Features: Moment.js offers many features related to date manipulation, formatting, and parsing, which can be beneficial for more complex applications.

**Cons**:
- Performance Drawback: As shown in the benchmark, Moment.js is significantly slower than the native Date approach. This can be a drawback in performance-sensitive applications. 
- Bundle Size: Including Moment.js increases the size of JavaScript bundles, which can affect load times in web applications.

### Other Considerations
While this benchmark specifically tests these two methods, there are other alternatives to consider:

1. **date-fns**:
   - A smaller, modular library that offers similar date manipulation features to Moment.js but allows importing only what you need, resulting in a smaller bundle size.

2. **Luxon**:
   - A modern JavaScript date library built by one of the Moment.js developers. It provides a rich set of APIs with support for internationalization and more modern date manipulation approaches.

3. **Native Intl.DateTimeFormat**:
   - For applications that need localization, the built-in `Intl` object provides robust options for date formatting without needing external libraries.

Clearer choices can be made based on specific project requirements, such as needing high performance or dealing with complex date manipulations or formats.

Related benchmarks:

Date JS VS MomentJS - isValid (version: 1)

Comparing performance of: Date JS vs MomentJS

Created: 9 months ago by: Guest

Jump to the latest result

Date JS

MomentJS

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model gpt-4o-mini, generated 9 months ago):