Benchmark: dayjs valueof vs isBefore

HTML Preparation code:

<script src="https://unpkg.com/dayjs@1.8.21/dayjs.min.js"></script>

Tests:

1
const date1 = dayjs(); const date2 = dayjs().add(1, 'd'); const test = date1.isBefore(date2) || date1.isSame(date2);
2
const date1 = dayjs(); const date2 = dayjs().add(1, 'd'); const test = date1.valueOf() <= date2.valueOf()

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
1
2

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/139.0.0.0 Safari/537.36

Browser/OS: Chrome 139 on Linux

View result in a separate tab

Test name	Executions per second
1	1308231.1 Ops/sec
2	1990980.9 Ops/sec

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

LLMs can make mistakes. Check important info.

Measuring JavaScript performance is an essential task, and MeasuringThat.net provides a great platform for doing so.

**Overview of the Benchmark**

The benchmark tests two different approaches to comparing dates in JavaScript: `isBefore` and `valueOf`. The goal is to determine which approach is faster.

**Options Compared**

There are two options being compared:

1. **`dayjs.isBefore(date, date)`**: This method checks if a date (`date2`) is before another date (`date1`). It returns a boolean value indicating whether the second date is before the first date.
2. **`date1.valueOf() <= date2.valueOf()`**: This approach converts both dates to their native JavaScript number representations using `valueOf()` and then compares them.

**Pros and Cons of Each Approach**

1. **`dayjs.isBefore(date, date)`**:
	* Pros:
		+ More readable code
		+ Less prone to errors due to explicit checks for date ranges
	* Cons:
		+ May be slower than the native `valueOf()` approach due to the additional method call and potential overhead of the `dayjs` library
2. **`date1.valueOf() <= date2.valueOf()`**:
	* Pros:
		+ Faster execution, as it only involves a direct comparison of numbers
	* Cons:
		+ Less readable code
		+ More prone to errors if not handled correctly (e.g., dealing with dates that are not in the same timezone)

**Library: dayjs**

The `dayjs` library is used for date manipulation and formatting. It provides an efficient way to work with dates, including methods like `add()`, `isBefore()`, and `valueOf()`. However, it may introduce additional overhead compared to native JavaScript operations.

**Special JS Feature/Syntax**

There are no specific JavaScript features or syntax mentioned in the benchmark definition. The code only uses standard JavaScript syntax for variable declarations, assignment, and comparison operators.

**Other Alternatives**

If you're interested in exploring alternative approaches to comparing dates, consider the following:

1. **Native JavaScript `Date` methods**: Instead of using a library like `dayjs`, you can use native JavaScript `Date` methods, such as `getTime()` or `getTimezoneOffset()`. However, these methods may not provide the same level of functionality and readability as `dayjs`.
2. **Other date libraries**: Other popular date libraries for JavaScript include Moment.js, Luxon, and Date-fns. Each library has its strengths and weaknesses, and you should consider factors like performance, ease of use, and feature set when choosing a library.

Keep in mind that the choice of approach or library ultimately depends on your specific requirements, such as performance, readability, and maintainability.

Related benchmarks:

dayjs valueof vs isBefore (version: 0)

Comparing performance of: 1 vs 2

Created: one year ago by: Guest

Jump to the latest result

1

2

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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