Benchmark: moment.js parse vs parseZone vs new Date for iso 8601 date

HTML Preparation code:

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

Script Preparation code:

var dates = Array(100000).fill(new Date().toISOString());

Tests:

moment.parseZone
dates.forEach(date => moment.parseZone(date, 'YYYY-MM-DDTHH:mm:ss.SSS0000Z'));
new Date()
dates.forEach(date => new Date(date));
moment
dates.forEach(date => moment(date));

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
moment.parseZone
new Date()
moment

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 7 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/140.0.0.0 Safari/537.36

Browser/OS: Chrome 140 on Windows

View result in a separate tab

Test name	Executions per second
moment.parseZone	1.2 Ops/sec
new Date()	42.4 Ops/sec
moment	1.3 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down what's being tested in the provided JSON.

**Overview**

The benchmark compares three approaches to parse ISO 8601-formatted dates:

1. `new Date()` ( native JavaScript function)
2. `moment.parseZone()` from the Moment.js library
3. `moment()` without any additional parameters ( likely using default parsing settings)

These approaches are tested in a loop of 100,000 iterations on an array of ISO 8601-formatted dates.

**Options Compared**

The options compared are:

* **Native JavaScript: `new Date()`**: This approach uses the native JavaScript function to parse the date string. It's likely to be the fastest and most efficient approach since it doesn't require any external libraries.
* **Moment.js: `moment.parseZone()`**: This approach uses the Moment.js library, specifically its `parseZone()` method, to parse the date string. Moment.js is a popular JavaScript library for working with dates and times.
* **Moment.js (default parsing): `moment()`**: This approach uses the Moment.js library without any additional parameters, which likely means it will use default parsing settings.

**Pros and Cons**

Here's a brief summary of each approach:

* **Native JavaScript: `new Date()`**
	+ Pros: Fastest and most efficient, no external dependencies.
	+ Cons: May not handle all edge cases or formatting options.
* **Moment.js: `moment.parseZone()`**
	+ Pros: Robust handling of date formats, can be configured for specific use cases.
	+ Cons: Requires an additional library dependency, may introduce performance overhead.
* **Moment.js (default parsing): `moment()`
	+ Pros: Easy to use and familiar syntax, likely includes some default settings.
	+ Cons: May not handle all edge cases or formatting options, could be slower than native JavaScript.

**Library Overview**

The Moment.js library is a popular JavaScript library for working with dates and times. It provides robust handling of various date formats and can be configured to meet specific use case requirements.

In the context of this benchmark, `moment.parseZone()` is used to parse ISO 8601-formatted dates with timezone information. This approach allows Moment.js to handle more complex date formatting scenarios compared to native JavaScript or default parsing settings.

**Special JS Feature/Syntax**

There doesn't seem to be any special JavaScript features or syntax mentioned in the provided JSON. However, it's worth noting that the benchmark assumes a specific ISO 8601 date format with timezone information (e.g., "YYYY-MM-DDTHH:mm:ss.SSS0000Z").

**Alternatives**

If you need to parse dates and times in JavaScript, other alternatives to Moment.js include:

* `Date.parse()`: Similar to `new Date()`, but returns a timestamp instead of a `Date` object.
* Other date parsing libraries, such as Luxon or dayjs.

However, for most use cases, Moment.js remains a popular choice due to its ease of use and robust feature set.

Related benchmarks:

moment.js parse vs parseZone vs new Date for iso 8601 date (version: 1)

Comparing performance of: moment.parseZone vs new Date() vs moment

Created: 2 years ago by: Registered User

Jump to the latest result

moment.parseZone

new Date()

moment

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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