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query complexity
(version: 0)
Comparing performance of:
data attribute plain vs data attribute div
Created:
5 years ago
by:
Guest
Jump to the latest result
HTML Preparation code:
<div id="wrap"> <div class="hello class2" id="hello2" data-src="weqwesad">Hello</div> <img src="" width="500" height="600" class="hello class3" id="hello3" data-src="wedqwesd"> <div class="hello class4" id="hello4" data-src="weqwecsd">Hello</div> <img src="" width="500" height="600" class="hello class5" id="hello5" data-src="wexqwesd"> <div class="hello class6" id="hello6" data-src="weqwvesd">Hello</div> <img src="" width="500" height="600" class="hello class7" id="hello7" data-src="weqwzesd"> <div class="hello class8" id="hello8" data-src="wevqwesd">Hello</div> <img src="" width="500" height="600" class="hello class9" id="hello9" data-src="weqwbesd"> <div class="hello class10" id="hello10" data-src="weqcwesd">Hello</div> <img src="" width="500" height="600" class="hello class11" id="hello11" data-src="weqzwesd"> <div class="hello class12" id="hello12" data-src="weqswesd">Hello</div> <img src="" width="500" height="600" class="hello class13" id="hello13" data-src="wgeqwesd"> <div class="hello class14" id="hello14" data-src="weqwhesd">Hello</div> <img src="" width="500" height="600" class="hello class15" id="hello15" data-src="weqwvesd"> </div>
Tests:
data attribute plain
document.getElementById('wrap').querySelector('[data-src]');
data attribute div
document.getElementById('wrap').querySelector('div[data-src]');
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 plain
data attribute div
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's dive into the provided benchmark. **What is being tested?** MeasureThat.net is testing the performance of two different approaches to select elements based on their `data-src` attribute: 1. **Querying by plain data attribute**: This approach uses `document.getElementById('wrap').querySelector('[data-src]');`. It directly selects an element by its class name, but then filters it based on a specific attribute. 2. **Querying by HTML attribute**: This approach uses `document.getElementById('wrap').querySelector('div[data-src]');`. It selects elements based on their HTML `data-src` attribute. **Options being compared** Two options are being compared: * Approach 1: Querying by plain data attribute * Approach 2: Querying by HTML attribute **Pros and Cons of each approach** * **Querying by plain data attribute (Approach 1)**: + Pros: - Efficient, as it only selects elements based on their class name. - Can be faster for complex queries. + Cons: - Requires an additional filter step, which might lead to slightly slower execution times. * **Querying by HTML attribute (Approach 2)**: + Pros: - More concise and readable, as it directly selects elements based on their `data-src` attribute. - Might be faster for simple queries. + Cons: - Less efficient than Approach 1, as it requires more DOM nodes to be traversed. **Library and syntax used** In the provided benchmark, the `querySelector` function is used. This function is part of the Document Object Model (DOM) API in JavaScript, which provides a way to select elements based on various criteria. No additional libraries are required for this benchmark. **Special JS feature or syntax** There is no special JavaScript feature or syntax used in this benchmark. The `querySelector` function is a standard part of the DOM API and does not rely on any specific browser-specific features or syntax. **Other alternatives** If you were to implement these benchmarks from scratch, here are some alternative approaches: * **Using `getElementsByAttribute()`**: Instead of using `querySelector`, you could use `getElementsByAttribute()` to select elements based on their `data-src` attribute. * **Using a library like jQuery**: If you prefer a more concise and readable approach, you could use a library like jQuery to select elements based on their `data-src` attribute. * **Using a CSS selector**: You could also use a CSS selector, such as `[data-src]`, to select elements based on their `data-src` attribute. However, these alternatives might introduce additional overhead or dependencies that are not relevant to this benchmark.
Related benchmarks:
DataAttribute vs Class Selector vs ID Selector (multi-class)
data-src complexity
ID-selector vs Class-selector vs Data-attribute-selector (extended)
queryall vs classname
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