Benchmark: canvas setTransform: values vs DOMMAtrix vs matrix init

Script Preparation code:

var canvas = document.createElement("canvas"),
ctx = canvas.getContext("2d"),
m = new DOMMatrix(),
a = m.a = 1,
b = m.b = 0,
c = m.c = 0,
d = m.d = 2,
e = m.e = 3,
f = m.f = 4,
s = { a: a, b: b, c: c, d: d, e: e, f: f };

Tests:

values
ctx.setTransform(a, b, c, d, e, f);
matrix
ctx.setTransform(m);
matrix spoof
ctx.setTransform(s);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
values
matrix
matrix spoof

Fastest: N/A

Slowest: N/A

Latest run results:

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark definition and test cases.

**What is tested on the provided JSON?**

The provided JSON represents a JavaScript microbenchmark that tests three different approaches to setting the transformation matrix for a 2D context (ctx) in the Canvas API. The benchmarks measure how fast each approach is.

**Options being compared:**

1. **Using individual values**: `ctx.setTransform(a, b, c, d, e, f);`
	* Pros:
		+ Easy to read and understand.
	* Cons:
		+ May be slower due to the overhead of passing multiple arguments.
2. **Using a DOMMatrix object**: `ctx.setTransform(m);`
	* Pros:
		+ Can be faster since it only requires one operation (passing a single object).
		+ Reduces the number of arguments, which can lead to better optimization by the JavaScript engine.
3. **Using a matrix spoof object**: `ctx.setTransform(s);`
	* Pros:
		+ May be faster than using individual values due to the reduced number of arguments.
		+ Similar to using a DOMMatrix object, but with additional properties that might make it more efficient.

**Library and its purpose:**

1. **DOMMatrix**: A 3x4 matrix used for 2D transformations in the Canvas API. It's an object that encapsulates transformation values (a-f).
2. **Matrix spoof**: A custom object created by modifying the `s` variable in the benchmark preparation code to mimic a DOMMatrix object.

**Other considerations:**

* The test cases use a simple, uniform 2D transformation matrix with values 1, 0, 0, 2, 3, and 4.
* The benchmark is run on a desktop browser (Chrome 95) with a high number of executions per second (up to 672166.3125).
* The results suggest that using individual values might be slower than the other two approaches.

**Alternative approaches:**

1. **Using `ctx.save()` and `ctx.restore()`**: This approach would save the current transformation matrix, apply new values, and then restore the original matrix. This method is not tested in this benchmark.
2. **Using a library like Math4**: A JavaScript library for 2D transformations that provides optimized functions for setting transformation matrices.

Keep in mind that the performance differences between these approaches might vary depending on the specific use case, browser version, and other factors.

Related benchmarks:

canvas setTransform: values vs DOMMAtrix vs matrix init (version: 0)

desc

Comparing performance of: values vs matrix vs matrix spoof

Created: 4 years ago by: Registered User

Jump to the latest result

values

matrix

matrix spoof

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):