Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
getAttribute vs className
(version: 0)
Comparing performance of:
className vs getAttribute
Created:
6 years ago
by:
Guest
Jump to the latest result
HTML Preparation code:
<div id="foo"></div>
Tests:
className
var element = document.getElementById("foo"); var class_name; var i = 1000; while (i--) { class_name = element.className; }
getAttribute
var element = document.getElementById("foo"); var class_name; var i = 1000; while (i--) { class_name = element.getAttribute('class'); }
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
Fork
Test case name
Result
className
getAttribute
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):
Let's break down the provided benchmark and explain what is tested, compared options, pros and cons of those approaches, and other considerations. **Benchmark Overview** The benchmark measures the performance difference between accessing an element's `className` property (getattribute) versus its `class` attribute using the `getAttribute()` method. The test case uses a simple HTML structure with an ID "foo" containing a single `<div>` element. **Options Compared** There are two options being compared: 1. **Accessing `className` property directly**: This approach accesses the `className` property of the `element` object. 2. **Using `getAttribute('class')` method**: This approach uses the `getAttribute()` method to retrieve the value of the `class` attribute. **Pros and Cons of Each Approach** 1. **Accessing `className` property directly**: * Pros: This is a more efficient and straightforward way to access the `className` value, as it does not require calling an additional method. * Cons: If the element's class name changes dynamically (e.g., due to JavaScript code), this approach may not reflect those changes. 2. **Using `getAttribute('class')` method**: * Pros: This approach can handle dynamic changes to the class name and is more robust in certain scenarios. * Cons: It requires calling an additional method, which might introduce a slight overhead. **Other Considerations** * The benchmark uses a simple HTML structure with a single `<div>` element. In real-world scenarios, elements may have multiple classes or nested elements, which can affect performance. * The `getattribute` method is used to retrieve the value of an attribute that may not always be set (e.g., if the class name is dynamically changed). This might lead to additional overhead in cases where the attribute is not present. **Library Used** The benchmark uses the `document.getElementById()` and `element.className` properties, which are part of the DOM (Document Object Model) API. The `getAttribute()` method is also used, but it's a standard JavaScript method that does not rely on any external libraries. **Special JS Feature or Syntax** There are no special JavaScript features or syntax being used in this benchmark. **Alternatives** Other alternatives to measure performance differences between accessing an element's class name include: * Using the `classList` property (introduced in ECMAScript 2015) to access the class list of an element. * Measuring the performance of using a CSS class instead of a JavaScript-provided class name (e.g., by modifying the HTML structure or adding a script that sets a class name). * Comparing the performance of different caching strategies, such as storing the class name in a variable versus accessing it directly.
Related benchmarks:
element.getAttribute("name") vs element.attributes.name.value
id vs getAttribute
DataAttribute vs Class Selector vs ID Selector vs ~=
DataAttribute vs Class Selector vs ID GetById
Comments
Confirm delete:
Do you really want to delete benchmark?