Benchmark: Setting Canvas Pixel

HTML Preparation code:

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

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

Script Preparation code:

$c = document.getElementById('c');
$ctx = $c.getContext('2d');
$ctx.clearRect(0, 0, 800, 300);
$px = $ctx.createImageData(1, 1);
$pxls = [];
for (var i=0; i<10000; ++i) $pxls.push({
   x: Math.random() * 800 << 0,
   y: Math.random() * 300 << 0,
   r: Math.random() * 255 << 0,
   g: Math.random() * 255 << 0,
   b: Math.random() * 255 << 0,
   a: Math.random() * 128 << 0 + 128
});
$i = 0;

 
$c = document.getElementById('c');$ctx = $c.getContext('2d');$ctx.clearRect(0, 0, 800, 300);$px = $ctx.createImageData(1, 1);$pxls = [];for (var i=0; i<10000; ++i) $pxls.push({   x: Math.random() * 800 << 0,   y: Math.random() * 300 << 0,   r: Math.random() * 255 << 0,   g: Math.random() * 255 << 0,   b: Math.random() * 255 << 0,   a: Math.random() * 128 << 0 + 128});$i = 0;

Tests:

fillRect/concat

for (var i=500;i--;){
var px = $pxls[$i++ % 10000];
$ctx.fillStyle = 'rgba(' + px.r + ',' + px.g + ',' + px.b + ',' + (px.a / 255) + ')';
$ctx.fillRect(px.x, px.y, 1, 1);
}

 
for (var i=500;i--;){var px = $pxls[$i++ % 10000];$ctx.fillStyle = 'rgba(' + px.r + ',' + px.g + ',' + px.b + ',' + (px.a / 255) + ')';$ctx.fillRect(px.x, px.y, 1, 1);}

fillRect/join
for (var i=500;i--;){ var px = $pxls[$i++ % 10000]; $ctx.fillStyle = 'rgba(' + [px.r,px.g,px.b,px.a/255].join() + ')'; $ctx.fillRect(px.x, px.y, 1, 1); }
for (var i=500;i--;){
var px = $pxls[$i++ % 10000];
$ctx.fillStyle = 'rgba(' + [px.r,px.g,px.b,px.a/255].join() + ')';
$ctx.fillRect(px.x, px.y, 1, 1);
}
1×1 Image Data
for (var i=500;i--;){ var px=$pxls[$i++ % 10000], d=$px.data; d[0] = px.r; d[1] = px.g; d[2] = px.b; d[3] = px.a; $ctx.putImageData($px, px.x, px.y); }
for (var i=500;i--;){
var px=$pxls[$i++ % 10000], d=$px.data;
d[0] = px.r;
d[1] = px.g;
d[2] = px.b;
d[3] = px.a;
$ctx.putImageData($px, px.x, px.y);
}

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Experimental features:

Memory measurements supported only in Chrome.
For precise memory measurements Chrome must be launched with --enable-precise-memory-info flag.
More information: Monitoring JavaScript Memory

Test case name	Result
fillRect/concat
fillRect/join
1×1 Image Data

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 3 days ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36

Browser/OS: Chrome 134 on Windows

View result in a separate tab

Test name	Executions per second
fillRect/concat	2764.6 Ops/sec
fillRect/join	2572.4 Ops/sec
1×1 Image Data	220.5 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated 5 months ago):

Let's break down the benchmark and its options.

Benchmark Overview

The benchmark measures the performance of different approaches for drawing a single pixel on a 2D canvas using JavaScript. The test case uses a predefined set of 10,000 pixels with random red, green, blue, and alpha values. The benchmark compares three different methods:

fillRect/concat
fillRect/join
1×1 Image Data

Options Comparison

`fillRect/concat`

This method uses string concatenation to build the rgba color string.

$ctx.fillStyle = 'rgba(' + px.r + ',' + px.g + ',' + px.b + ',' + (px.a / 255) + ')';

Pros:

Simple and concise code
Easy to read and maintain

Cons:

String concatenation can lead to performance issues due to repeated creation of new strings
May not be the most efficient way to build a string in JavaScript

`fillRect/join`

This method uses the join() method to concatenate the color components into a single string.

$ctx.fillStyle = 'rgba(' + [px.r, px.g, px.b, px.a/255].join() + ')';

Pros:

More efficient than concatenation due to reducing string creation overhead
Still readable and maintainable

Cons: None notable.

`1×1 Image Data`

This method uses the putImageData function to draw a single pixel from an image data array.

$ctx.putImageData($px, px.x, px.y);

Pros:

May be more efficient due to using native hardware acceleration for image rendering

Cons:

Requires additional memory allocation and management for the image data array
May require more complex code compared to the other two methods

Library Used

None.

Special JS Feature or Syntax

The benchmark uses the following features:

ES6 string interpolation (px.r is interpolated into a string)
Array destructuring (not necessary in this case, but used for demonstration purposes)

However, the putImageData function is not a new feature introduced in modern JavaScript versions. It's an older API that was introduced in HTML 5.

Other Alternatives

If you wanted to test alternative methods, you could consider:

Using a library like Pixi.js or Fabric.js for rendering graphics
Implementing custom drawing functions using WebAssembly or WebGL
Using a different rendering approach, such as vector graphics

Keep in mind that these alternatives may introduce additional complexity and dependencies compared to the original benchmark.

Benchmark Preparation Code Explanation

The script preparation code sets up a canvas element with an ID of "c" and creates a 2D drawing context ($ctx) for it. It then clears the canvas, creates a new image data object ($px), and populates it with random pixel values ($pxls). The script loop increments through the array of pixels, drawing each one on the canvas using the specified method.

Html Preparation Code Explanation

The HTML preparation code defines an empty <canvas> element with an ID of "c" and sets its width to 800 and height to 300.

LLMs can make mistakes. Check important info.

Let's break down the benchmark and its options.

**Benchmark Overview**

1. `fillRect/concat`
2. `fillRect/join`
3. `1×1 Image Data`

**Options Comparison**

### `fillRect/concat`

This method uses string concatenation to build the `rgba` color string.

```javascript
$ctx.fillStyle = 'rgba(' + px.r + ',' + px.g + ',' + px.b + ',' + (px.a / 255) + ')';
```

Pros:

* Simple and concise code
* Easy to read and maintain

Cons:

* String concatenation can lead to performance issues due to repeated creation of new strings
* May not be the most efficient way to build a string in JavaScript

### `fillRect/join`

This method uses the `join()` method to concatenate the color components into a single string.

```javascript
$ctx.fillStyle = 'rgba(' + [px.r, px.g, px.b, px.a/255].join() + ')';
```

Pros:

* More efficient than concatenation due to reducing string creation overhead
* Still readable and maintainable

Cons: None notable.

### `1×1 Image Data`

This method uses the `putImageData` function to draw a single pixel from an image data array.

```javascript
$ctx.putImageData($px, px.x, px.y);
```

Pros:

* May be more efficient due to using native hardware acceleration for image rendering

Cons:

* Requires additional memory allocation and management for the image data array
* May require more complex code compared to the other two methods

**Library Used**

None.

**Special JS Feature or Syntax**

The benchmark uses the following features:

* ES6 string interpolation (`px.r` is interpolated into a string)
* Array destructuring (not necessary in this case, but used for demonstration purposes)

However, the `putImageData` function is not a new feature introduced in modern JavaScript versions. It's an older API that was introduced in HTML 5.

**Other Alternatives**

If you wanted to test alternative methods, you could consider:

* Using a library like Pixi.js or Fabric.js for rendering graphics
* Implementing custom drawing functions using WebAssembly or WebGL
* Using a different rendering approach, such as vector graphics

Keep in mind that these alternatives may introduce additional complexity and dependencies compared to the original benchmark.

**Benchmark Preparation Code Explanation**

The script preparation code sets up a canvas element with an ID of "c" and creates a 2D drawing context (`$ctx`) for it. It then clears the canvas, creates a new image data object (`$px`), and populates it with random pixel values (`$pxls`). The script loop increments through the array of pixels, drawing each one on the canvas using the specified method.

**Html Preparation Code Explanation**

The HTML preparation code defines an empty `<canvas>` element with an ID of "c" and sets its width to 800 and height to 300.

Related benchmarks:

Setting Canvas Pixel (version: 1)

Comparing performance of: fillRect/concat vs fillRect/join vs 1×1 Image Data

Created: 7 years ago by: Registered User

Jump to the latest result

fillRect/concat

fillRect/join

1×1 Image Data

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 5 months ago):

`fillRect/concat`

`fillRect/join`

`1×1 Image Data`