Benchmark: Measure Text Methods fixed

HTML Preparation code:

<div id="my-div">Hello World</div>

Script Preparation code:

const canvas = document.createElement('canvas')
window.context = canvas.getContext('2d')
window.div = document.createElement('canvas');
window.div.innerHTML = "Hello world";

Tests:

offsetWidth
window.div.offsetWidth
getBoundingClientRect
window.div.getBoundingClientRect().width
canvas
window.context.measureText('Hello world')

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
offsetWidth
getBoundingClientRect
canvas

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 8 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/139.0.0.0 Safari/537.36

Browser/OS: Chrome 139 on Windows

View result in a separate tab

Test name	Executions per second
offsetWidth	48646252.0 Ops/sec
getBoundingClientRect	5408995.0 Ops/sec
canvas	1074260.4 Ops/sec

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

LLMs can make mistakes. Check important info.

**Benchmark Overview**

The provided benchmark measures the performance of three different methods to measure the width of a single string of text on a canvas element in JavaScript. The three methods being compared are:

1. `window.div.offsetWidth`
2. `window.div.getBoundingClientRect().width`
3. `window.context.measureText('Hello world')`

**Method 1: `window.div.offsetWidth`**

This method uses the `offsetWidth` property to get the width of the canvas element. It is a straightforward approach that directly accesses the width property of the element.

Pros:

* Simple and easy to understand
* Does not require any additional libraries or setup

Cons:

* May not be as accurate due to potential rounding errors or differences in rendering engines
* May not account for any CSS styles or layouts that affect the width

**Method 2: `window.div.getBoundingClientRect().width`**

This method uses the `getBoundingClientRect()` method to get the bounding rectangle of the canvas element, and then extracts the width from it.

Pros:

* More accurate than `offsetWidth`, as it takes into account any CSS styles or layouts that affect the width
* Provides a more precise measurement of the width

Cons:

* Requires an additional function call to get the bounding rectangle, which may introduce some overhead
* May not work correctly if the canvas element is not visible or has a non-standard layout

**Method 3: `window.context.measureText('Hello world')`**

This method uses the `measureText()` method of the canvas context to measure the width of the string.

Pros:

* Provides an accurate measurement of the width, taking into account any CSS styles or layouts that affect it
* Does not require any additional function calls or overhead

Cons:

* May have some performance overhead due to the need for a rendering engine
* Requires a working canvas element and context

**Library Usage**

The benchmark uses the `Canvas` API to create a canvas element and get its context. The `Canvas` API is a part of the Web API, which provides a set of APIs for drawing, animation, and other graphical operations in web pages.

**Special JS Feature or Syntax**

None mentioned.

**Alternative Approaches**

Other approaches to measure the width of a string on a canvas element might include:

* Using a library like jQuery or DOM manipulation libraries that provide methods for manipulating elements
* Creating a custom function using JavaScript's `DOM` and `Canvas` APIs
* Using a different rendering engine, such as SVG or WebGL

However, these approaches would likely require additional setup, libraries, or expertise, making the Canvas API approach more suitable for this benchmark.

Related benchmarks:

Measure Text Methods fixed (version: 0)

Using various methods to measure a single string of text.

Comparing performance of: offsetWidth vs getBoundingClientRect vs canvas

Created: 3 years ago by: Guest

Jump to the latest result

offsetWidth

getBoundingClientRect

canvas

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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