Benchmark: Date.parse vs new Date().getTime()

Tests:

new Date
new Date('01/01/2001').getTime();
Date.parse
Date.parse('01/01/2001');

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
new Date
Date.parse

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):

LLMs can make mistakes. Check important info.

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

**Benchmark Overview**

MeasureThat.net is a website that allows users to create and run JavaScript microbenchmarks. The provided benchmark compares the performance of two ways to get the current date: `new Date()` with `.getTime()` or using the `Date.parse()` method.

**Options Compared**

The two options being compared are:

1. **`new Date('01/01/2001').getTime();`**: This approach uses the `new Date()` constructor and passes a string representation of a date to it. The resulting object is then called with the `getTime()` method, which returns the number of milliseconds since January 1, 1970, 00:00:00 UTC.
2. **`Date.parse('01/01/2001');`**: This approach uses the `Date.parse()` method directly, passing a string representation of a date to it.

**Pros and Cons**

* **`new Date()` with `.getTime()`**:
	+ Pros: This approach is more explicit and allows for easy parsing of dates in a specific format. It also avoids potential issues with internationalization.
	+ Cons: This approach creates an object, which can be slower due to the overhead of creating objects.
* **`Date.parse()`**:
	+ Pros: This approach is simpler and faster, as it doesn't create an object.
	+ Cons: This approach can be less explicit and may produce incorrect results if the date string is not in a standard format.

**Library and Syntax**

In this benchmark, no specific library is used. However, note that `Date.parse()` has been deprecated in modern JavaScript versions since ECMAScript 2015 (ES6). It's recommended to use `new Date('...').getTime()` or other methods like `Intl.DateTimeFormat().parse()` instead.

**Special JS Feature/Syntax**

There are no special JavaScript features or syntax used in this benchmark. The code is standard JavaScript.

**Alternatives**

Other alternatives for getting the current date include:

* Using the `Date.now()` method, which returns the number of milliseconds since January 1, 1970, 00:00:00 UTC.
* Using the `Intl.DateTimeFormat().format(new Date())` method to format a date object in a specific way.

It's worth noting that these alternatives might not be exactly what this benchmark is testing, but they are other ways to achieve similar results.

Latest run results:

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

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:130.0) Gecko/20100101 Firefox/130.0

Browser/OS: Firefox 130 on Linux

View result in a separate tab

Test name	Executions per second
new Date	11104443.0 Ops/sec
Date.parse	14567982.0 Ops/sec

Related benchmarks:

Date.parse vs new Date().getTime() (version: 0)

Comparing performance of: new Date vs Date.parse

Created: 2 years ago by: Guest

Jump to the latest result

new Date

Date.parse

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):