Benchmark: Test save/restore

HTML Preparation code:

<canvas id="canvas" width="800" height="300"></canvas>

Script Preparation code:

$canvas = document.getElementById('canvas');
$context = $canvas.getContext('2d');
$context.clearRect(0, 0, 800, 300);

$iterations = 500;

Tests:

resetTransform
for (let i=0; i<$iterations; ++i) { $context.fillStyle = 'rgba(100,150,200,0.9)'; $context.fillRect(0, 0, 1, 1); $context.translate(50, 50); $context.rotate(50 * Math.PI / 180); $context.resetTransform(); }
Save/restore
for (let i=0; i<$iterations; ++i) { $context.save(); $context.fillStyle = 'rgba(100,150,200,0.9)'; $context.fillRect(0, 0, 1, 1); $context.translate(50, 50); $context.rotate(50 * Math.PI / 180); $context.restore(); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
resetTransform
Save/restore

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36

Browser/OS: Chrome 121 on Windows

View result in a separate tab

Test name	Executions per second
resetTransform	1026.8 Ops/sec
Save/restore	827.5 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 benchmark and its options.

**Benchmark Overview**

The benchmark tests two approaches to drawing on a canvas element in JavaScript: one using `resetTransform()` (option 1) and the other using `save()` and `restore()` (option 2).

**Option 1: Using `resetTransform()`**

This option uses `resetTransform()` to reset the transformation matrix after each draw operation. The transformation matrix is used to perform transformations like rotation, scaling, and translation on the canvas.

Pros:

* Simpler code: Only one method call (`resetTransform()`) is needed to restore the default transformation state.
* Faster execution: Since only a single method call is made, this option may be faster in terms of execution time.

Cons:

* Inaccurate results: If the canvas context is updated before calling `resetTransform()`, it will affect the subsequent draw operations. This might lead to inaccurate results or artifacts on the canvas.
* Not suitable for complex graphics: Since only the transformation matrix is restored, this option may not be suitable for more complex graphics where multiple transformations are applied.

**Option 2: Using `save()` and `restore()`**

This option uses `save()` to save the current state of the transformation matrix and `restore()` to restore it after each draw operation. This approach allows subsequent draw operations to build upon the previous state without affecting each other.

Pros:

* Accurate results: By saving and restoring the transformation matrix, this option ensures accurate results and prevents artifacts on the canvas.
* Suitable for complex graphics: This option is suitable for more complex graphics where multiple transformations are applied.

Cons:

* More code: Two method calls (`save()` and `restore()`) are needed to manage the transformation state, which may make the code slightly more complex.
* Slower execution: Since two method calls are made, this option may be slower in terms of execution time compared to Option 1.

**Library Usage**

The benchmark uses the HTML5 Canvas API, which is a built-in feature of modern browsers. The `document.getElementById()` and `getContext()` methods are used to interact with the canvas element.

**Special JavaScript Feature or Syntax**

None mentioned in this benchmark.

**Other Alternatives**

If you were to rewrite this benchmark using other approaches:

* **Using a library**: You could use a library like Canvas.js, which provides more advanced features for working with canvases. However, this would add dependencies and complexity to the benchmark.
* **Using hardware acceleration**: You could also test the performance of each option when using hardware acceleration (e.g., WebGL). This would require more complex setup and might not be necessary for a simple canvas benchmark.
* **Using a different drawing approach**: Depending on your specific use case, you might consider using alternative drawing approaches like SVG or pixel manipulation. However, these alternatives would likely introduce new complexities and trade-offs.

Overall, the choice of option depends on the specific requirements of your project and the trade-offs you're willing to make between performance, accuracy, and simplicity.

Related benchmarks:

Test save/restore (version: 0)

Comparing performance of: resetTransform vs Save/restore

Created: 2 years ago by: Guest

Jump to the latest result

resetTransform

Save/restore

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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