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querySelectorAll custom attribute vs class name
(version: 0)
Comparing performance of:
custom attribute vs class name
Created:
2 years ago
by:
Guest
Jump to the latest result
HTML Preparation code:
<div class="test" js="test"></div> <div class="test" js="test"></div> <div class="test" js="test"></div> <div class="test" js="test"></div> <div class="test" js="test"></div> <div class="test" js="test"></div> <div class="test" js="test"></div> <div class="test" js="test"></div> <div class="test" js="test"></div> <div class="test" js="test"></div> <div class="test" js="test"></div> <div class="test" js="test"></div> <div class="test" js="test"></div> <div class="test" js="test"></div> <div class="test" js="test"></div> <div class="test" js="test"></div> <div class="test" js="test"></div> <div class="test" js="test"></div> <div class="test" js="test"></div> <div class="test" js="test"></div>
Tests:
custom attribute
const test = document.querySelectorAll('[js="test"]');
class name
const test = document.querySelectorAll('.test');
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
custom attribute
class name
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
**Benchmark Overview** The MeasureThat.net benchmark measures the performance difference between using custom attributes versus class names to select elements in JavaScript. **Options Compared** Two options are being compared: 1. **Custom Attribute**: Using custom attributes (e.g., `js="test"`) to select elements. 2. **Class Name**: Using class names (e.g., `.test`) to select elements. **Pros and Cons of Each Approach** * **Custom Attribute**: + Pros: - Can be used to store arbitrary data associated with an element. - Can be more convenient for complex selection scenarios. + Cons: - May lead to increased DOM node creation, as each attribute represents a separate DOM object. - May cause issues with attribute parsing and validation. * **Class Name**: + Pros: - Generally faster than custom attributes, as class names are cached by the browser. - Easier to maintain, as class names can be reused across multiple elements. + Cons: - Limited to simple string matching (e.g., `.test`). - May not work well with complex selection scenarios. **Library and Purpose** The `querySelectorAll` method is used in both test cases. This method is part of the DOM API, which provides a way to select elements based on various criteria, such as class names or attributes. **Special JS Feature or Syntax** None are mentioned in this benchmark. However, it's worth noting that custom attributes can be deprecated in future versions of JavaScript, and their usage may be discouraged in favor of more modern approaches. **Other Alternatives** If the goal is to select elements based on a specific attribute or value, other alternatives could include: * Using `getAttribute` and `setAttribute` methods to manually access and modify element attributes. * Utilizing libraries like jQuery or Lodash, which provide more extensive selection capabilities. * Leveraging modern JavaScript features like template literals or computed properties to dynamically generate selector strings. Keep in mind that each approach has its trade-offs, and the best choice depends on the specific use case and requirements.
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