Benchmark: canvas2d.drawImage(imageElement) vs createImageBitmap(imageElement) (v2)

Script Preparation code:

var img = new Image();
var canvas = document.createElement('canvas');
var resCanvas = document.createElement('canvas');
var isReady = false;

var frameRaw1 = null;
var frameRaw2 = null;
var result = null;

img.addEventListener('load', function() {
    createImageBitmap(img).then(function(imageBitmap) {
      frameRaw2 = imageBitmap;
      canvas.width = frameRaw2.width;
      canvas.height = frameRaw2.height;
      frameRaw1 = canvas.getContext('2d');
      resCanvas.width = frameRaw2.width;
      resCanvas.height = frameRaw2.height;
      result = resCanvas.getContext('2d');
      isReady = true;
	});
});

img.src = 'https://media.discordapp.net/attachments/447410261289205781/574359442913492992/unknown.png';

Tests:

canvas2d.drawImage(imageElement)
frameRaw1.clearRect(0, 0, canvas.width, canvas.height); frameRaw1.drawImage(img, 0, 0); result.drawImage(canvas, 0, 0);
createImageBitmap(imageElement)
createImageBitmap(img).then(function(r) { frameRaw2 = imageBitmap; result.drawImage(frameRaw2, 0, 0); });

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
canvas2d.drawImage(imageElement)
createImageBitmap(imageElement)

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/145.0.0.0 Safari/537.36 Edg/145.0.0.0

Browser/OS: Chrome 145 on Windows

View result in a separate tab

Test name	Executions per second
canvas2d.drawImage(imageElement)	0.0 Ops/sec
createImageBitmap(imageElement)	129735.8 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down what is tested in the provided JSON benchmark.

The test is comparing two approaches:

1. `canvas2d.drawImage(imageElement)`
2. `createImageBitmap(imageElement)`

**What are these approaches?**

* `canvas2d.drawImage(imageElement)` is a low-level method that draws an image on a 2D canvas context. It requires manual management of the image's pixels, which can be slow and error-prone.
* `createImageBitmap(imageElement)` is a higher-level API that creates a bitmap representation of an image element. This allows for faster rendering and manipulation of images without the need for manual pixel management.

**Pros and Cons**

* **`canvas2d.drawImage(imageElement)`**
	+ Pros:
		- Can be used to manipulate individual pixels, which can be useful for custom graphics or games.
		- Allows for more direct control over image rendering.
	+ Cons:
		- Requires manual pixel management, which can lead to performance issues and errors if not done correctly.
		- Can be slow due to the need for repeated updates to the canvas context.
* **`createImageBitmap(imageElement)`**
	+ Pros:
		- Faster rendering and manipulation of images without manual pixel management.
		- Reduces the risk of performance issues and errors associated with low-level pixel management.
	+ Cons:
		- May not offer as much direct control over image rendering or manipulation.
		- Can be less intuitive for developers who are familiar with low-level graphics APIs.

**Library:**

In this benchmark, `createImageBitmap` is a Web API provided by modern browsers. It allows developers to create bitmap representations of images without having to manually manage pixels. This library provides a convenient and efficient way to work with images in web applications.

**Special JS feature or syntax:**

None mentioned in the benchmark definition. However, it's worth noting that the use of `async/await` in the script preparation code is a modern JavaScript feature introduced in ECMAScript 2017 (ES7). This syntax allows for more concise and readable asynchronous code.

**Alternatives:**

Other alternatives to these approaches include:

* Using other graphics APIs like WebGL or HTML5 Canvas without the `createImageBitmap` API.
* Employing manual pixel management using techniques like bit manipulation or array indexing.
* Utilizing libraries like Pixi.js, Phaser, or Fabric.js that provide higher-level abstraction and simplified graphics functionality.

In general, the choice of approach depends on the specific requirements and constraints of your project. If you need fine-grained control over image rendering and manipulation, `canvas2d.drawImage(imageElement)` might be a better choice. However, if speed and convenience are more important, `createImageBitmap(imageElement)` could be a more suitable option.

Related benchmarks:

canvas2d.drawImage(imageElement) vs createImageBitmap(imageElement) (v2) (version: 0)

Comparing performance of: canvas2d.drawImage(imageElement) vs createImageBitmap(imageElement)

Created: 5 years ago by: Guest

Jump to the latest result

canvas2d.drawImage(imageElement)

createImageBitmap(imageElement)

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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