Benchmark: drawImage() benchmarking problem

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:

Scale up to large canvas
$destContext.drawImage($sourceCanvas, 0, 0, $sourceWidth, $sourceHeight, 0, 0, 3000, 3000);
Scale up to medium canvas
$destContext.drawImage($sourceCanvas, 0, 0, $sourceWidth, $sourceHeight, 0, 0, 1000, 1000);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Scale up to large canvas
Scale up to medium canvas

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 4 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4147.105 Safari/537.36

Browser/OS: Chrome 84 on Mac OS X 10.15.6

View result in a separate tab

Test name	Executions per second
Scale up to large canvas	27605.2 Ops/sec
Scale up to medium canvas	201464.8 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks.

The provided JSON represents a benchmark test case for measuring performance differences between two approaches to scaling up an image using the `drawImage()` method in JavaScript. The test is designed to evaluate how different browsers and devices handle this common web development task.

**Benchmark Definition**

The benchmark definition consists of two main parts:

1. **Script Preparation Code**: This code sets up two canvases, `$sourceCanvas` and `$destCanvas`, where `$sourceCanvas` has a fixed size of 100x100 pixels, and `$destCanvas` has a larger size of 3000x3000 pixels. The script also creates a context for each canvas using the `getContext()` method.
2. **Benchmark Definition**: This is a JavaScript code snippet that uses the `drawImage()` method to draw the source image onto the destination canvas at different scaling factors (100% and 25%). The `$destContext.drawImage()` method takes several arguments:
	* The first two arguments (`$sourceCanvas` and `(0, 0)`) specify the source canvas and its top-left corner.
	* The next two arguments (`$sourceWidth` and `$sourceHeight`) specify the source image's width and height.
	* The last two arguments (`3000` and `3000`) specify the destination canvas's width and height.

**Individual Test Cases**

The test case consists of two individual benchmarks:

1. **Scale up to large canvas**: This benchmark uses a scaling factor of 100% (i.e., no scaling is applied) and draws the source image onto the larger `$destCanvas`.
2. **Scale up to medium canvas**: This benchmark uses a scaling factor of 25% (i.e., the source image is resized by 25%) and draws it onto the medium-sized `$destCanvas`.

**Options Compared**

The two benchmarks compare the performance differences between drawing the source image at its original size versus resizing it using different scaling factors.

**Pros and Cons**

* **Original Size**: This approach is simpler, as it doesn't require resizing the source image. However, it may not be suitable for all use cases, especially when dealing with large images or when image quality is crucial.
* **Scaling Factor**: This approach can help improve performance by reducing the amount of data transferred and processed during the drawing process. However, it may introduce additional overhead due to the resizing process.

**Library and Purpose**

In this benchmark, there is no explicitly mentioned library. However, the `getContext()` method is used to access the canvas context, which is a built-in API provided by modern browsers for working with HTML5 canvases.

**Special JS Feature or Syntax**

There are no special JavaScript features or syntaxes mentioned in this benchmark definition.

**Other Alternatives**

If you want to create your own microbenchmark using `MeasureThat.net`, you can start by defining a new benchmark test case and writing the corresponding script preparation code, HTML preparation code (if needed), and individual test cases. The process involves:

1. Defining a JavaScript function that performs the desired operation or set of operations.
2. Creating a script preparation code snippet that sets up any necessary variables, contexts, or libraries.
3. Writing an individual test case for each benchmark you want to evaluate.
4. Running the benchmark and collecting performance data using `MeasureThat.net`.

Keep in mind that creating effective microbenchmarks requires careful consideration of factors like performance, consistency, and relevance to your specific use case.

Related benchmarks:

drawImage() benchmarking problem (version: 0)

Comparing performance of: Scale up to large canvas vs Scale up to medium canvas

Created: 4 years ago by: Registered User

Jump to the latest result

Scale up to large canvas

Scale up to medium canvas

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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