Benchmark: Diff miliseconds

Tests:

Date - Date.now()
const a = new Date(Date.parse("2022-01-01T00:00:00.000Z")) - Date.now()
Date.getTime() - Date.now()
const b = new Date(Date.parse("2022-01-01T00:00:00.000Z")).getTime() - Date.now()
Date.parse() - Date.now()
const c = Date.parse("2022-01-01T00:00:00.000Z") - Date.now()

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Date - Date.now()
Date.getTime() - Date.now()
Date.parse() - Date.now()

Fastest: N/A

Slowest: N/A

Latest run results:

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

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

**Benchmark Purpose:**
The benchmark is designed to compare the performance of three different ways to calculate the difference between two dates in JavaScript, which are:

1. Using the `Date` constructor with a string parsing argument (`new Date(Date.parse("2022-01-01T00:00:00.000Z")) - Date.now()`).
2. Using the `getTime()` method of the `Date` object (`new Date(Date.parse("2022-01-01T00:00:00.000Z")).getTime() - Date.now()`).
3. Using the `parse()` method without creating a new `Date` object (`Date.parse("2022-01-01T00:00:00.000Z") - Date.now()`).

**Options Comparison:**

* **Option 1 (New Date with parsing):** This method creates a new `Date` object using the provided string, and then subtracts the current time (`Date.now()`) from it.
	+ Pros:
		- It's a straightforward way to calculate the difference between two dates.
	+ Cons:
		- Creating a new `Date` object can be expensive in terms of performance.
* **Option 2 (getTime() method):** This method calls the `getTime()` method on an existing `Date` object created using the `Date` constructor, and then subtracts the current time (`Date.now()`).
	+ Pros:
		- It avoids creating a new `Date` object, which can be more efficient.
	+ Cons:
		- It requires creating an intermediate `Date` object, which can still incur some overhead.
* **Option 3 (parse() method without Date creation):** This method directly calls the `parse()` method on the global `Date` object, and then subtracts the current time (`Date.now()`).
	+ Pros:
		- It avoids creating a new `Date` object altogether.
	+ Cons:
		- The `parse()` method can be slower due to its implementation details.

**Library Considerations:**
The benchmark uses the `Date` object and its methods, which is built-in to JavaScript. No external libraries are required.

**Special JS Features or Syntax:**
There's no special JavaScript feature or syntax used in this benchmark beyond what's normally available in modern JavaScript implementations.

**Alternatives:**
Other alternatives for calculating date differences include:

* Using the `DateInterval` class from a library like Moment.js, which provides more advanced date manipulation capabilities.
* Utilizing a third-party library like Date-Fns, which offers optimized and efficient date arithmetic functions.
* Implementing custom date arithmetic functions using bitwise operations or other low-level techniques.

Keep in mind that the performance differences between these alternatives may be negligible for simple use cases, but can become significant when dealing with large datasets or high-performance applications.

Related benchmarks:

Diff miliseconds (version: 1)

Comparing performance of: Date - Date.now() vs Date.getTime() - Date.now() vs Date.parse() - Date.now()

Created: 3 years ago by: Registered User

Jump to the latest result

Date - Date.now()

Date.getTime() - Date.now()

Date.parse() - Date.now()

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

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