Benchmark: creating Date from data

Tests:

Date from String
new Date("2023-10-20T05:35:42.653Z")
Date from Int timestamp
new Date(1697780142653)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Date from String
Date from Int timestamp

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.1:latest, generated one month ago):

LLMs can make mistakes. Check important info.

Let's dive into the details of this benchmark.

**What is being tested?**

The benchmark is testing the performance of creating a `Date` object in JavaScript using two different methods:

1. Creating a `Date` object from a string representation of a date (e.g., "2023-10-20T05:35:42.653Z").
2. Creating a `Date` object from an integer timestamp representing the number of milliseconds since January 1, 1970 (e.g., 1697780142653).

**Library and Special Features**

In this benchmark, no external libraries are used. The tests only utilize built-in JavaScript features.

**Options Compared**

The two test cases compare the performance of creating a `Date` object using:

* Method 1: `new Date("2023-10-20T05:35:42.653Z")`
	+ Pros:
		- Easier to read and write for human developers.
		- Allows for more flexible date formats (e.g., ISO 8601).
	+ Cons:
		- May be slower than using an integer timestamp due to the parsing overhead.
* Method 2: `new Date(1697780142653)`
	+ Pros:
		- Faster execution time due to direct timestamp conversion.
	+ Cons:
		- Requires knowledge of the date format and the number of milliseconds in JavaScript.

**Other Considerations**

When choosing between these methods, consider the following:

* If you're working with human-readable dates or timestamps, using the string representation (Method 1) is often more convenient and readable.
* When dealing with large datasets or performance-critical code, using an integer timestamp (Method 2) can provide a significant speedup.

**Alternatives**

If these methods don't meet your specific needs, you may consider:

* Using a dedicated date library like Moment.js or Date-fns for more advanced date manipulation and formatting.
* Utilizing the `Date.now()` function to get the current timestamp in milliseconds.

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:109.0) Gecko/20100101 Firefox/118.0

Browser/OS: Firefox 118 on Mac OS X 10.15

View result in a separate tab

Test name	Executions per second
Date from String	12439684.0 Ops/sec
Date from Int timestamp	31197468.0 Ops/sec

Related benchmarks:

creating Date from data (version: 0)

Comparing performance of: Date from String vs Date from Int timestamp

Created: one year ago by: Guest

Jump to the latest result

Date from String

Date from Int timestamp

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.1:latest, generated one month ago):