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querySelectorAll data attribute vs class name need
(version: 0)
Comparing performance of:
data attribute vs class name
Created:
3 years ago
by:
Guest
Go to the latest result
HTML Preparation code:
<div class="test" data-attribute="test"></div> <div class="test" data-attribute="test"></div> <div class="test" data-attribute="test"></div> <div class="test" data-attribute="test"></div> <div class="test" data-attribute="test"></div> <div class="test" data-attribute="test"></div> <div class="test" data-attribute="test"></div> <div class="test" data-attribute="test"></div> <div class="test" data-attribute="test"></div> <div class="test" data-attribute="test"></div> <div class="test" data-attribute="test"></div> <div class="test" data-attribute="test"></div> <div class="test" data-attribute="test"></div> <div class="test" data-attribute="test"></div> <div class="test-need" data-need="test"></div> <div class="test" data-attribute="test"></div> <div class="test" data-attribute="test"></div> <div class="test" data-attribute="test"></div> <div class="test" data-attribute="test"></div> <div class="test" data-attribute="test"></div> <div class="test" data-attribute="test"></div> <div class="test" data-attribute="test"></div> <div class="test" data-attribute="test"></div> <div class="test" data-attribute="test"></div>
Tests:
data attribute
var test = document.querySelectorAll('[data-need]');
class name
var test = document.querySelectorAll('.test-need');
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
data attribute
class name
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
one year ago
)
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.36
Browser/OS:
Chrome 136 on Mac OS X 10.15.7
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=606267" width="100%" height="500px"></iframe>
class name
3.2M/s
data attribute
1.9M/s
View exact numbers
Test name
Executions per second
✓
class name
3,150,477 Ops/sec
data attribute
1,850,236 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
**Benchmark Overview** MeasureThat.net is a website that allows users to create and run JavaScript microbenchmarks. The provided benchmark definition and results are used to compare the performance of two approaches: using a `data-need` attribute versus using a class name in document query selection. **Options Compared** The two options compared are: 1. **Data Attribute Approach**: This approach uses the `querySelectorAll()` method with a CSS selector that targets elements with a `data-need` attribute. 2. **Class Name Approach**: This approach uses the `querySelectorAll()` method with a CSS selector that targets elements with a class name of "test-need". **Pros and Cons** **Data Attribute Approach** Pros: * More flexible, as attributes can be customized to match specific requirements * Can be used in conjunction with other selectors Cons: * May have performance overhead due to attribute lookup * Requires additional attribute manipulation (e.g., setting and parsing attributes) **Class Name Approach** Pros: * Generally faster, as class name lookup is more efficient than attribute lookup * More straightforward to implement and maintain Cons: * Less flexible, as class names must be predefined and matched exactly * May not work correctly if classes are dynamically added or removed **Library Used: None** No libraries are explicitly mentioned in the benchmark definition. However, it's worth noting that `querySelectorAll()` is a built-in method of the Document Object Model (DOM), which means no external library is required. **Special JS Feature/ Syntax: None** There are no special JavaScript features or syntax used in this benchmark. **Other Alternatives** Other approaches to select elements by attribute or class name include: * `getElementsById()` and `getAttribute()` methods for accessing element attributes * Regular expressions (RegExp) for matching attribute values * jQuery's `.attr()` and `.hasClass()` methods for working with classes and attributes However, these alternatives may have performance implications or require additional libraries, making the `querySelectorAll()` method a more suitable choice for this benchmark.
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