Benchmark: +new Date() vs Date.now()

Tests:

+new Date()
+new Date()
Date.now()
Date.now()

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
+new Date()
Date.now()

Fastest: N/A

Slowest: N/A

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/109.0.0.0 Safari/537.36

Browser/OS: Chrome 109 on Windows

View result in a separate tab

Test name	Executions per second
+new Date()	2322839.8 Ops/sec
Date.now()	3794831.5 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the explanation of the provided benchmark.

**Overview**

The test compares two different ways to get the current timestamp in JavaScript: using the `Date` object with the `new` keyword (`+new Date()`) versus using the `now()` method (`Date.now()`).

**Options Compared**

There are two options being compared:

1. **`+new Date()`**: This method creates a new `Date` object and returns its value as a string. It's essentially equivalent to calling `new Date()`.
2. **`Date.now()`**: This method returns the number of milliseconds since the Unix Epoch (January 1, 1970) as an integer.

**Pros and Cons**

*   **`+new Date()`**:
    *   Pros: Can be used in arithmetic expressions and is commonly used for date-related calculations.
    *   Cons: Creates a new `Date` object each time it's called, which can lead to increased memory usage and slower performance compared to the other option.
*   **`Date.now()`**:
    *   Pros: More efficient and faster than creating a new `Date` object. It also doesn't require parsing or formatting.
    *   Cons: Returns milliseconds since the Unix Epoch, so it may not be suitable for all use cases (e.g., calculating days or years).

**Library**

There is no external library being used in this benchmark.

**Special JS Features/Syntax**

None are mentioned in the provided code snippets.

Related benchmarks:

+new Date() vs Date.now() (version: 0)

Comparing performance of: +new Date() vs Date.now()

Created: one year ago by: Guest

Jump to the latest result

+new Date()

Date.now()

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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