Benchmark: Compare of different Canvas Context2D properties RW

Script Preparation code:

window.ctx = document.createElement('canvas').getContext('2d');
ctx.customProp = 2;

Tests:

Fill Color Read
const fillColor = ctx.fillStyle
Fill Color Write
ctx.fillStyle = 'rgba(255, 0, 0, 0.5)';
Line width read
const lineWidth = ctx.lineWidth;
Line width write
ctx.lineWidth = 2;
Custom Property Read
const customProp = ctx.customProp;
Custom Property Write
ctx.customProp = 2;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Fill Color Read
Fill Color Write
Line width read
Line width write
Custom Property Read
Custom Property Write

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

This benchmark does not have any results yet. Be the first one to run it!

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what is being tested, the different approaches compared, their pros and cons, and other considerations.

**Benchmark Overview**

The benchmark measures the performance of different properties in the `Canvas Context2D` API, specifically:

1. Reading and writing fill color (`fillStyle`)
2. Reading and writing line width (`lineWidth`)
3. Reading and writing a custom property (`customProp`)

**Approaches Compared**

There are three approaches compared:

### 1. Direct Property Access

This approach involves directly accessing the `fillStyle`, `lineWidth`, or `customProp` properties.

Pros: Simple, straightforward access to the properties.
Cons: May involve unnecessary computations or memory allocations if the property is not cached or optimized.

Example:
```javascript
const fillColor = ctx.fillStyle;
```
### 2. Property Assignment and Read

This approach involves assigning a value to the property (e.g., `fillStyle`) followed by reading its current value.

Pros: May optimize caching or computations for the property.
Cons: Introduces additional overhead due to assignment and read operations.

Example:
```javascript
ctx.fillStyle = 'rgba(255, 0, 0, 0.5)';
const fillColor = ctx.fillStyle;
```
### 3. Property Read-Write-Read (RW-RW-R)

This approach involves reading the property's initial value, assigning a new value, and then reading the updated value.

Pros: May optimize caching or computations for the property by reusing the cached value.
Cons: Introduces additional overhead due to repeated reads and writes.

Example:
```javascript
const lineWidth = ctx.lineWidth;
ctx.lineWidth = 2;
const lineWidthUpdated = ctx.lineWidth;
```
**Library Used**

The `Canvas Context2D` API is a built-in JavaScript library for working with 2D graphics in web browsers. The `customProp` property is not part of the standard Canvas API, suggesting that it's a custom or experimental feature.

**Special JS Feature/Syntax**

There is no special JavaScript feature or syntax used in this benchmark. However, it's worth noting that the use of `customProp` suggests that the benchmark may be testing a non-standard or experimental feature.

**Other Alternatives**

If you're interested in comparing different Canvas API properties, here are some alternative approaches:

* Use other properties like `strokeStyle`, `strokeWidth`, or `fillOpacity`.
* Compare performance with and without caching or optimization.
* Experiment with different rendering contexts (e.g., `CanvasRenderingContext2D` vs. `WebGLContext2`).

**Benchmark Preparation Code**

The provided script preparation code creates a new `canvas` element, gets its 2D drawing context (`ctx`), and sets the `customProp` property to `2`.

**Individual Test Cases**

Each test case is defined by a JSON object with two properties:

* `Benchmark Definition`: The JavaScript code that defines the benchmark.
* `Test Name`: A descriptive name for the test case.

These test cases cover different aspects of the Canvas API, such as reading and writing fill color, line width, and custom property values.

Related benchmarks:

Compare of different Canvas Context2D properties RW (version: 0)

Compare of different Canvas Context2D properties RW

Comparing performance of: Fill Color Read vs Fill Color Write vs Line width read vs Line width write vs Custom Property Read vs Custom Property Write

Created: 5 years ago by: Guest

Jump to the latest result

Fill Color Read

Fill Color Write

Line width read

Line width write

Custom Property Read

Custom Property Write

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

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