Benchmark: Date.now() vs new Date().getTime() asdasdasdasdasdaa sdas adsasd asd

Script Preparation code:

var timestamp = null;

Tests:

Date.now()
timestamp = Date.now();
new Date().getTime();
timestamp = new Date().getTime();
new Date().toISOString();
timestamp = new Date().toISOString();

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Date.now()
new Date().getTime();
new Date().toISOString();

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36

Browser/OS: Chrome 114 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Date.now()	3975012.0 Ops/sec
new Date().getTime();	3469946.2 Ops/sec
new Date().toISOString();	883115.1 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down what's being tested in this JavaScript microbenchmark.

**Benchmark Definition**

The benchmark is testing three different approaches to get the current timestamp:

1. `Date.now()`
2. `new Date().getTime()`
3. `new Date().toISOString()`

**Options Compared**

The benchmark is comparing the performance of these three approaches across different devices and browsers.

* **`Date.now()`**: This method returns the number of milliseconds since the Unix Epoch (January 1, 1970) as an integer.
* **`new Date().getTime()`**: This method returns the timestamp in milliseconds since the Unix Epoch.
* **`new Date().toISOString()`**: This method returns a string representation of the date and time in ISO format (YYYY-MM-DDTHH:MM:SS.SSSZ).

**Pros and Cons**

1. **`Date.now()`**:
	* Pros: Simple, fast, and widely supported across devices and browsers.
	* Cons: Returns an integer value, which may not be as precise as other methods for some use cases (e.g., timekeeping).
2. **`new Date().getTime()`**:
	* Pros: Provides a more precise timestamp than `Date.now()`, making it suitable for applications that require high precision.
	* Cons: Returns a floating-point value, which may lead to slight performance overhead due to the conversion process.
3. **`new Date().toISOString()`**:
	* Pros: Returns a string representation of the date and time in ISO format, making it easily parsable by other systems or applications.
	* Cons: This method is slower than `Date.now()` and `new Date().getTime()` due to the overhead of converting to a string.

**Library/Features**

None mentioned in the benchmark definition. However, note that `Date.now()` and `new Date().getTime()` are built-in methods in JavaScript, while `new Date().toISOString()` is a method provided by the `Date` object.

**Special JS Features/Syntax**

No special features or syntax mentioned in this benchmark. The focus is on comparing different approaches to get the current timestamp.

**Alternatives**

If you're looking for alternative ways to measure time in JavaScript, consider:

1. **`performance.now()`**: This method provides high-resolution timing and is suitable for measuring performance in web applications.
2. **`requestAnimationFrame()`**: This method allows you to run code repeatedly at a specified interval, making it useful for animations and other high-frequency tasks.

Keep in mind that these alternatives might require additional setup or consideration depending on your specific use case.

Related benchmarks:

Date.now() vs new Date().getTime() asdasdasdasdasdaa sdas adsasd asd (version: 0)

Comparing performance of: Date.now() vs new Date().getTime(); vs new Date().toISOString();

Created: 4 years ago by: Guest

Jump to the latest result

Date.now()

new Date().getTime();

new Date().toISOString();

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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