Benchmark: getBBox() vs getBoundingClientRect() vs getComputedTextLength()

HTML Preparation code:

<svg width="150" height="150">
	<text id="test1" y="50">test1</text>
	<text id="test2" y="100">
		<tspan id="test3">test3</tspan>	
	</text>
	<tspan id="test4">test4</tspan>
</svg>

Script Preparation code:

var test1 = document.getElementById('test1');
var test2 = document.getElementById('test2');
var test3 = document.getElementById('test3');
var test4 = document.getElementById('test4');

Tests:

getBBox
test1.getBBox().width; test2.getBBox().width; test3.getBBox().width; test4.getBBox().width;
getBoundingClientRect
test1.getBoundingClientRect().width; test2.getBoundingClientRect().width; test3.getBoundingClientRect().width; test4.getBoundingClientRect().width;
getComputedTextLength
test1.getComputedTextLength(); test2.getComputedTextLength(); test3.getComputedTextLength(); test4.getComputedTextLength();

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
getBBox
getBoundingClientRect
getComputedTextLength

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/131.0.0.0 Safari/537.36

Browser/OS: Chrome 131 on Windows

View result in a separate tab

Test name	Executions per second
getBBox	215952.8 Ops/sec
getBoundingClientRect	166300.6 Ops/sec
getComputedTextLength	236599.1 Ops/sec

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

LLMs can make mistakes. Check important info.

**Benchmark Explanation**

The provided JSON represents a JavaScript microbenchmarking test created on the MeasureThat.net website. The test compares the performance of three different methods to measure the width of text elements:

1. `getBBox()`: This method returns the bounding box (rectangular area) around an element.
2. `getBoundingClientRect()`: This method returns the size and position of an element relative to the viewport.
3. `getComputedTextLength()`: This method returns the length of a text string.

**Benchmark Options Comparison**

The three methods have different approaches to measuring text width:

* `getBBox()` is the most straightforward, as it directly returns the bounding box width. However, this method may not be suitable for elements with non-rectangular shapes or variable-sized text.
* `getBoundingClientRect()` also returns a rectangular area, but it takes into account the element's position and size relative to the viewport. This method can provide more accurate results for elements with complex geometries or dynamic sizes.
* `getComputedTextLength()` returns only the length of the text string, without considering any additional context like font styles or layouts. This method is likely the fastest but may not be suitable for all use cases.

**Pros and Cons of Each Approach**

* `getBBox()`:
	+ Pros: Simple, fast, and easy to implement.
	+ Cons: May not work well with non-rectangular elements or variable-sized text.
* `getBoundingClientRect()`:
	+ Pros: More accurate for complex geometries and dynamic sizes.
	+ Cons: Requires considering the element's position and size relative to the viewport.
* `getComputedTextLength()`:
	+ Pros: Fastest, as it only returns the text length.
	+ Cons: May not work well with non-text elements or context-dependent layouts.

**Library Usage**

The test uses SVG elements, which are HTML5 graphics elements that provide a way to create vector graphics. The `svg` element is used to render the text elements with varying widths and positions. There is no explicit library mentioned in the JSON data.

**Special JS Features or Syntax**

There is no specific JavaScript feature or syntax highlighted in this benchmark. However, it's worth noting that MeasureThat.net tests various aspects of JavaScript performance, including those related to DOM manipulation, event handling, and more.

**Alternative Benchmarking Approaches**

If you're interested in exploring alternative methods for measuring text width, consider the following approaches:

* Use CSS properties like `max-width` or `width` directly on HTML elements.
* Utilize libraries like jQuery's `width()` method or React's `style.width` property.
* Implement custom algorithms using JavaScript functions to calculate text width based on font metrics and layout considerations.

Keep in mind that each approach has its strengths and weaknesses, and the best choice depends on your specific use case and performance requirements.

Related benchmarks:

getBBox() vs getBoundingClientRect() vs getComputedTextLength() (version: 0)

Comparing performance of: getBBox vs getBoundingClientRect vs getComputedTextLength

Created: 4 years ago by: Guest

Jump to the latest result

getBBox

getBoundingClientRect

getComputedTextLength

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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