Benchmark: Normal Line vs Rectangle Line

HTML Preparation code:

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

Script Preparation code:

var c = document.getElementById('c');
var ctx = c.getContext('2d');
ctx.clearRect(0, 0, 800, 300);
ctx.fillStyle = 'rgb(255,0,0)';
ctx.strokeStyle = 'rgb(255,0,0)';

Tests:

FillRect
for (var i = 0; i < 800; i++) { ctx.fillRect(i, 80, i+1, 1); }
LineTo
for (var i = 0; i < 800; i++) { ctx.beginPath(); ctx.moveTo(i,80); ctx.lineTo(i+1,80); ctx.stroke(); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
FillRect
LineTo

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:129.0) Gecko/20100101 Firefox/129.0

Browser/OS: Firefox 129 on Windows

View result in a separate tab

Test name	Executions per second
FillRect	2813.6 Ops/sec
LineTo	1682.3 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the benchmark and its test cases.

**Benchmark Overview**

The benchmark compares two approaches to drawing lines on a canvas: `fillRect` and `lineTo`. The benchmark uses the 2D drawing context (`ctx`) of an HTML5 canvas element. The script preparation code sets up the canvas, clears it, and defines the fill and stroke styles as red. The test cases are contained within individual objects that define their respective benchmark definitions.

**Test Cases**

There are two test cases:

1. `FillRect`:
```javascript
for (var i = 0; i < 800; i++) {
    ctx.fillRect(i, 80, i+1, 1);
}
```
This test case uses the `fillRect` method to draw horizontal lines along the top edge of the canvas, with each line's right edge aligned with the next line. The `i` variable is used as the x-coordinate of the rectangle.

2. `LineTo`:
```javascript
for (var i = 0; i < 800; i++) {
    ctx.beginPath();
    ctx.moveTo(i,80);
    ctx.lineTo(i+1,80);
    ctx.stroke();
}
```
This test case uses the `lineTo` method to draw horizontal lines along the top edge of the canvas. The first call to `moveTo` sets the starting point of the line at x-coordinate `i`, and the second call to `lineTo` sets the ending point of the line at x-coordinate `i+1`. The `stroke` method is called after drawing each line.

**Library: 2D Drawing Context (`ctx`)**

The 2D drawing context (`ctx`) is a built-in JavaScript object that provides methods for manipulating graphics on an HTML5 canvas element. It's used to draw shapes, lines, and text on the canvas. In this benchmark, `ctx` is used to perform the actual drawing operations.

**Pros and Cons of Each Approach**

1. `FillRect`:
Pros:

* Typically faster than using `lineTo`, as it's optimized for filling rectangular areas.
* Can be more efficient for large numbers of lines or rectangles.

Cons:

* May not provide exact control over line positions, as the rectangle's edges are aligned with integer values.
* Can lead to artifacts or visual glitches if not used correctly.

2. `LineTo`:
Pros:

* Provides precise control over line positions and directions.
* Allows for smooth curves and arcs by using multiple `lineTo` calls.

Cons:

* Typically slower than using `fillRect`, as it requires more computation for each line segment.
* Can be less efficient for large numbers of lines or rectangles, depending on the canvas implementation.

**Other Considerations**

When choosing between `fillRect` and `lineTo`, consider the specific requirements of your use case. If you need precise control over line positions or want to draw complex shapes with smooth curves, `LineTo` might be a better choice. However, if you're drawing large numbers of simple lines or rectangles, `FillRect` could be faster.

**Alternative Approaches**

Other approaches for drawing lines on a canvas include:

1. Using the `canvas.pathData` attribute to define the line's path and then calling `ctx.stroke()` to render it.
2. Utilizing WebGL (Web Graphics Library) for more complex graphics rendering, which can provide better performance but requires additional setup and expertise.
3. Employing libraries like Paper.js or Fabric.js for more advanced canvas manipulation and drawing capabilities.

Keep in mind that the specific approach you choose will depend on your project's requirements, performance constraints, and personal preference.

Related benchmarks:

Normal Line vs Rectangle Line (version: 2)

canvas stuff

Comparing performance of: FillRect vs LineTo

Created: one year ago by: Registered User

Jump to the latest result

FillRect

LineTo

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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