Benchmark: drawImage() scaling up & down small performance

Script Preparation code:

$sourceWidth = 100;
$sourceHeight = 100;
$sourceCanvas = document.createElement("canvas");
$sourceCanvas.width = $sourceWidth;
$sourceCanvas.height = $sourceHeight;
$sourceContext = $sourceCanvas.getContext("2d");
$sourceContext.fillStyle = "rgba(0,100,200,1)";
$sourceContext.fillRect(0, 0, $sourceWidth, $sourceHeight);

$destCanvas = document.createElement("canvas");
$destCanvas.width = 3000;
$destCanvas.height = 3000;
$destContext = $destCanvas.getContext("2d");

Tests:

Scaling from a small canvas area to a small canvas area (no scaling)
$destContext.drawImage($sourceCanvas, 0, 0, $sourceWidth, $sourceHeight, 0, 0, $sourceWidth, $sourceHeight); // Force the drawImage call to be evaluated within this benchmark code: $destContext.getImageData(0, 0, 1, 1);
Scaling from a small canvas area to a smaller canvas area
$destContext.drawImage($sourceCanvas, 0, 0, $sourceWidth, $sourceHeight, 0, 0, 50, 50); // Force the drawImage call to be evaluated within this benchmark code: $destContext.getImageData(0, 0, 1, 1);
Scaling from a small canvas area to a large canvas area
$destContext.drawImage($sourceCanvas, 0, 0, $sourceWidth, $sourceHeight, 0, 0, 3000, 3000); // Force the drawImage call to be evaluated within this benchmark code: $destContext.getImageData(0, 0, 1, 1);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Scaling from a small canvas area to a small canvas area (no scaling)
Scaling from a small canvas area to a smaller canvas area
Scaling from a small canvas area to a large canvas area

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

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

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I'd be happy to help you understand what's being tested in the provided benchmark.

**What is being tested?**

The benchmark measures the performance of the `drawImage` method when scaling an image from a small canvas area to another canvas area. The test cases compare three different scenarios:

1. Scaling from a small canvas area to a small canvas area (no scaling).
2. Scaling from a small canvas area to a smaller canvas area.
3. Scaling from a small canvas area to a large canvas area.

**Options compared**

In each test case, the `drawImage` method is called with different arguments:

* In scenario 1, no scaling factors are provided (`0, 0`, `50, 50`).
* In scenario 2, the scaling factor for the smaller dimension is set to `50`.
* In scenario 3, the scaling factor for both dimensions is set to `3000`.

**Pros and cons of different approaches**

1. **No scaling**: This approach tests the performance of `drawImage` when no scaling is required. It's a good baseline for comparison.
2. **Scaling by smaller dimension**: Providing a smaller scaling factor for one dimension (e.g., width) can reduce the computational load, but it may not accurately represent real-world scenarios where images are often scaled by both dimensions.
3. **Scaling by larger dimension**: Scaling by both dimensions equally (e.g., `3000` in both width and height) likely represents a more realistic scenario, as most image scaling operations require equal or proportional scaling.

The pros of each approach are:

* No scaling: Simple to implement, easy to compare baseline performance.
* Scaling by smaller dimension: May reduce computational load, potentially faster execution times.
* Scaling by larger dimension: More representative of real-world scenarios, possibly slower execution times due to increased computation.

**Library usage**

In the benchmark code, two libraries are used:

1. `Canvas`: a HTML5 canvas element that provides 2D drawing capabilities.
2. `2d Context` (not explicitly mentioned, but implied by the context): a 2D graphics context that allows you to perform drawing operations on a Canvas.

**Special JS features or syntax**

There doesn't seem to be any special JavaScript features or syntax used in this benchmark, aside from the use of template literals (`$sourceWidth`, `$sourceHeight`, etc.) and the `drawImage` method, which is a standard part of the HTML5 Canvas API.

**Alternatives**

If you wanted to create similar benchmarks for other image processing operations, you could consider testing:

1. **Image resizing**: Measure performance when resizing an image using different algorithms or techniques (e.g., nearest-neighbor, bilinear, bicubic).
2. **Image cropping**: Test performance when cropping an image using different methods (e.g., simple rectangle crop, more advanced techniques like content-aware resizing).
3. **Image filtering**: Benchmark the performance of applying filters to images using various algorithms or libraries (e.g., OpenCV).

Keep in mind that each benchmark would require its own specific test cases and optimization strategies.

Related benchmarks:

drawImage() scaling up & down small performance (version: 0)

Comparing performance of: Scaling from a small canvas area to a small canvas area (no scaling) vs Scaling from a small canvas area to a smaller canvas area vs Scaling from a small canvas area to a large canvas area

Created: 3 years ago by: Guest

Jump to the latest result

Scaling from a small canvas area to a small canvas area (no scaling)

Scaling from a small canvas area to a smaller canvas area

Scaling from a small canvas area to a large canvas area

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):