Benchmark: Three.js vector copy proposal benchmark

HTML Preparation code:

<script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/84/three.js" integrity="sha256-FlZMxx4ovIzb9UVKM4+xrQqIDgW2o1aEDVRXANdMpZU=" crossorigin="anonymous"></script>

Script Preparation code:

vec2 = new THREE.Vector2()

vec3 = new THREE.Vector3()

vec3.proposedCopy = function(v) {

	if ("x" in v) this.x = v.x;
	if ("y" in v) this.y = v.y;
	if ("z" in v) this.z = v.z;

	return this;
}

Tests:

Current copy
vec3.copy(vec2)
Proposed copy
vec3.proposedCopy(vec2)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Current copy
Proposed copy

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 months ago)

User agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/109.0.0.0 Safari/537.36 OPR/95.0.0.0

Browser/OS: Opera 95 on Windows 7

View result in a separate tab

Test name	Executions per second
Current copy	188562992.0 Ops/sec
Proposed copy	172307120.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided JSON data and explain what's being tested.

**Benchmark Definition**

The benchmark is defined by two test cases: "Current copy" and "Proposed copy". The benchmark is related to three.js, a JavaScript library for creating and displaying 3D graphics in the browser. Specifically, it tests the performance of copying vectors between `THREE.Vector2` (a 2D vector) and `THREE.Vector3` (a 3D vector).

**Script Preparation Code**

The script preparation code defines two variables: `vec2` and `vec3`, both instances of `THREE.Vector2` and `THREE.Vector3`, respectively. It also defines a function `vec3.proposedCopy` that takes a `THREE.Vector2` object as input and attempts to copy its properties (`x`, `y`, and `z`) to the corresponding fields in the `THREE.Vector3` object.

**Html Preparation Code**

The HTML preparation code includes a reference to the latest version of three.js, which is required for the benchmark to work.

**Individual Test Cases**

There are two test cases:

1. **Current copy**: This test case calls the built-in `copy()` method on the `vec3` object, passing the `vec2` object as an argument.
2. **Proposed copy**: This test case calls the custom `proposedCopy()` function defined in the script preparation code, passing the `vec2` object as an argument.

**Pros and Cons of Different Approaches**

The built-in `copy()` method is likely to be faster because it's a optimized implementation provided by three.js. However, this approach may not be suitable for all use cases, such as when you need more control over the copying process.

The custom `proposedCopy()` function, on the other hand, provides more flexibility but may introduce overhead due to the additional function call and branching.

**Other Considerations**

* The benchmark measures the number of executions per second, which is a common metric for performance testing.
* The test uses a real-world browser (Chrome 97) to simulate user interactions.
* The benchmark runs on desktop platforms only, which may limit its relevance to mobile or other environments.

**Alternatives**

If you were to modify this benchmark or create new ones, you might consider:

1. Using different three.js versions or configurations to see how performance changes over time.
2. Adding more test cases for different vector sizes (e.g., `THREE.Vector4`).
3. Incorporating other libraries or frameworks that interact with three.js, such as physics engines or animation systems.
4. Measuring additional metrics, like memory usage or CPU utilization, to get a more comprehensive understanding of the system's performance.

Keep in mind that these alternatives would require significant changes to the benchmark definition and script preparation code.

Related benchmarks:

Three.js vector copy proposal benchmark (version: 2)

Comparing performance of: Current copy vs Proposed copy

Created: 9 years ago by: Registered User

Jump to the latest result

Current copy

Proposed copy

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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