Benchmark: Date comparison without time

Tests:

By string comparison
//this method isn't multiple timezone safe, make sure both dates are generated at the same timezone let dateA = new Date(2023, 09, 27, 08, 02, 0); if (dateA.toISOString().split("T")[0] < new Date().toISOString().split("T")[0]) { throw "The dateA is past."; }
By Date UTC and setHours zero
const dateA = new Date(2023, 09, 27, 08, 02, 0); const today = new Date(); today.setHours(0, 0, 0, 0) if (new Date(Date.UTC(dateA.getFullYear(), dateA.getMonth(), dateA.getDate()), 0, 0, 0, 0) < today) { throw "The dateA is past."; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
By string comparison
By Date UTC and setHours zero

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 27 days ago):

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and its test cases.

**Benchmark Overview**

The benchmark is designed to compare two approaches for comparing dates in JavaScript:

1. **By String Comparison**: This approach converts both dates to strings using `toISOString()` and compares them lexicographically.
2. **By Date UTC and setHours Zero**: This approach creates a new date object with the same year, month, and day as the original date, but sets the hours, minutes, seconds, and milliseconds to zero ( effectively creating a point in time). It then compares this new date object with the current date.

**Comparison of Approaches**

### By String Comparison

Pros:

* Simple and easy to implement
* No need for additional libraries or modules

Cons:

* Can be slower than other approaches due to string comparison
* May not work correctly across different timezones or cultures

In this approach, both dates are converted to strings using `toISOString()`. This method is simple but can lead to issues when dealing with different timezones or cultural settings.

### By Date UTC and setHours Zero

Pros:

* Faster than string comparison due to faster date arithmetic
* More accurate across different timezones and cultures

Cons:

* Requires more complex implementation (creating a new date object with set hours)
* May require additional libraries or modules for timezone handling

In this approach, the original date is modified by setting its hours, minutes, seconds, and milliseconds to zero. This creates a point in time that can be compared with the current date. This method is more accurate but requires more complex implementation.

**Library Usage**

There is no explicit library usage mentioned in the provided benchmark definition or test cases. However, it's worth noting that some libraries like Moment.js or Luxon might be used for handling dates and timezones in real-world applications.

**Special JavaScript Features or Syntax**

There are no special JavaScript features or syntax mentioned in the benchmark definition or test cases. The focus is on comparing two date comparison approaches.

**Other Alternatives**

If the developers want to explore other alternatives, they could consider:

* Using a dedicated library like Moment.js for handling dates and timezones
* Implementing a custom date comparison algorithm that takes into account timezone differences
* Using a different approach, such as using a Date object's built-in methods like `getTime()` or `getUTCDate()`

Overall, the benchmark provides a simple and straightforward way to compare two date comparison approaches. By analyzing the results, developers can determine which approach is faster and more accurate for their specific use case.

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/117.0.0.0 Safari/537.36 Edg/117.0.2045.41

Browser/OS: Chrome 117 on Windows

View result in a separate tab

Test name	Executions per second
By string comparison	267886.1 Ops/sec
By Date UTC and setHours zero	618707.8 Ops/sec

Related benchmarks:

Date comparison without time (version: 0)

Comparing performance of: By string comparison vs By Date UTC and setHours zero

Created: one year ago by: Guest

Jump to the latest result

By string comparison

By Date UTC and setHours zero

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 27 days ago):