Benchmark: Setting Canvas Pixel with extra test case using backtick

HTML Preparation code:

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

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<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; $ctx.putImageData($px, px.x, px.y); }
for (var i=500;i--;){
var px=$pxls[$i++ % 10000], d=$px.data;
$ctx.putImageData($px, px.x, px.y);
}
fillRect/backtick
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);
}

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
fillRect/backtick

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 5 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/76.0.3809.100 Safari/537.36

Browser/OS: Chrome 76 on Mac OS X 10.14.6

View result in a separate tab

Test name	Executions per second
fillRect/concat	849.8 Ops/sec
fillRect/join	811.6 Ops/sec
1×1 Image Data	20.0 Ops/sec
fillRect/backtick	849.4 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated 6 months ago):

Let's break down the benchmark and its various components.

Benchmark Definition

The benchmark is designed to test the performance of different ways to set a pixel color on an HTML5 canvas element using JavaScript. The script preparation code creates a 2D context ($ctx) on a canvas element with specific dimensions (800x300 pixels) and clears the canvas. It then generates an array of pixel data ($pxls) containing random RGB values.

Individual Test Cases

There are four test cases, each comparing a different approach to set a single pixel color on the canvas:

fillRect/concat: Uses a simple string concatenation to build the RGBA color string.
fillRect/join: Utilizes the built-in join() method to concatenate the RGB values into a single string.
1×1 Image Data: Uses the putImageData() method to set the pixel data directly on the canvas context.
fillRect/backtick: Employs template literals (backticks) to format the RGBA color string.

Options Compared

The test cases compare the performance of different approaches to set a single pixel color:

Concatenation vs. join() for building the RGBA color string
Using putImageData() vs. simple string concatenation or backtick formatting

Pros and Cons of Each Approach

Here's a brief summary of the pros and cons of each approach:

Concatenation (fillRect/concat):
- Pros: Simple, widely supported, and efficient.
- Cons: May be slower due to string concatenation overhead.
Join (fillRect/join):
- Pros: Faster than concatenation due to optimized join() method implementation.
- Cons: Requires JavaScript 1.5+ for native join() support.
Put Image Data (1×1 Image Data):
- Pros: Can be faster and more efficient, especially when dealing with large pixel arrays.
- Cons: May require additional memory allocations and copies due to the putImageData() method's behavior.

Other Considerations

The use of template literals (backticks) in fillRect/backtick is a relatively new feature introduced in JavaScript 2015. While it provides a more concise way to format strings, its performance impact may vary depending on the specific browser and implementation.
The test cases do not account for potential differences in hardware acceleration or canvas rendering optimizations between browsers.

Alternatives

Other alternatives that could be explored include:

Using canvas.toDataURL() to generate an image URL from the pixel data, which might offer a different performance profile compared to setting individual pixels directly.
Implementing custom, platform-agnostic string formatting functions to optimize the RGBA color string construction.
Comparing performance with different canvas rendering modes or contexts (e.g., requestAnimationFrame(), Web Workers).

Keep in mind that these alternatives would require additional benchmarking and testing to validate their performance impact.

LLMs can make mistakes. Check important info.

Let's break down the benchmark and its various components.

**Benchmark Definition**

The benchmark is designed to test the performance of different ways to set a pixel color on an HTML5 canvas element using JavaScript. The script preparation code creates a 2D context (`$ctx`) on a canvas element with specific dimensions (800x300 pixels) and clears the canvas. It then generates an array of pixel data (`$pxls`) containing random RGB values.

**Individual Test Cases**

There are four test cases, each comparing a different approach to set a single pixel color on the canvas:

1. `fillRect/concat`: Uses a simple string concatenation to build the RGBA color string.
2. `fillRect/join`: Utilizes the built-in `join()` method to concatenate the RGB values into a single string.
3. `1×1 Image Data`: Uses the `putImageData()` method to set the pixel data directly on the canvas context.
4. `fillRect/backtick`: Employs template literals (backticks) to format the RGBA color string.

**Options Compared**

The test cases compare the performance of different approaches to set a single pixel color:

* Concatenation vs. `join()` for building the RGBA color string
* Using `putImageData()` vs. simple string concatenation or backtick formatting

**Pros and Cons of Each Approach**

Here's a brief summary of the pros and cons of each approach:

1. **Concatenation (`fillRect/concat`)**:
	* Pros: Simple, widely supported, and efficient.
	* Cons: May be slower due to string concatenation overhead.
2. **Join (`fillRect/join`)**:
	* Pros: Faster than concatenation due to optimized `join()` method implementation.
	* Cons: Requires JavaScript 1.5+ for native `join()` support.
3. **Put Image Data (`1×1 Image Data`)**:
	* Pros: Can be faster and more efficient, especially when dealing with large pixel arrays.
	* Cons: May require additional memory allocations and copies due to the `putImageData()` method's behavior.

**Other Considerations**

* The use of template literals (backticks) in `fillRect/backtick` is a relatively new feature introduced in JavaScript 2015. While it provides a more concise way to format strings, its performance impact may vary depending on the specific browser and implementation.
* The test cases do not account for potential differences in hardware acceleration or canvas rendering optimizations between browsers.

**Alternatives**

Other alternatives that could be explored include:

* Using `canvas.toDataURL()` to generate an image URL from the pixel data, which might offer a different performance profile compared to setting individual pixels directly.
* Implementing custom, platform-agnostic string formatting functions to optimize the RGBA color string construction.
* Comparing performance with different canvas rendering modes or contexts (e.g., `requestAnimationFrame()`, Web Workers).

Keep in mind that these alternatives would require additional benchmarking and testing to validate their performance impact.

Related benchmarks:

Setting Canvas Pixel with extra test case using backtick (version: 0)

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

Created: 5 years ago by: Guest

Jump to the latest result

fillRect/concat

fillRect/join

1×1 Image Data

fillRect/backtick

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 6 months ago):