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JQuery object cache
(version: 0)
Comparing performance of:
JQuery selector object cached vs JQuery selector object not cached
Created:
4 years ago
by:
Guest
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HTML Preparation code:
<script src='https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.1/jquery.js'></script> <div class="wrong"> <div class="not this one"> <div class="block" style="width: 100px; height: 100px;"></div> </div> </div>
Tests:
JQuery selector object cached
var block = $('.this .block').first(); block.height(); block.addClass('animated'); block.width(); block.removeClass('animated');
JQuery selector object not cached
$('.this .block').first().height(); $('.this .block').first().addClass('animated'); $('.this .block').first().width(); $('.this .block').first().removeClass('animated');
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
JQuery selector object cached
JQuery selector object not cached
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided benchmark and analyze what's being tested. **Benchmark Purpose** The benchmark measures how long it takes to execute JavaScript code that uses jQuery selectors with caching vs. without caching. **Caching Options** In this benchmark, there are two options being compared: 1. **Cached jQuery selector**: The first test case uses a cached jQuery selector by assigning the result of `$('.this .block').first()` to a variable `block`. This allows subsequent executions of the same selector to reuse the cached result. 2. **Non-Cached jQuery selector**: The second test case does not cache the jQuery selector and executes it every time, using `$('.this .block').first()` **Pros and Cons** **Cached jQuery selector:** Pros: * Faster execution times since the result is reused * Reduced overhead due to less frequent DOM queries Cons: * Can lead to stale data if the DOM structure changes between executions * May cause issues with dependencies or side effects that rely on the cached result **Non-Cached jQuery selector:** Pros: * More accurate results since the execution always sees the latest DOM state * Easier to test and debug, as each execution is independent Cons: * Slower execution times due to repeated DOM queries * Increased overhead due to more frequent DOM manipulation **Library Usage** In this benchmark, jQuery is used as a library. jQuery is a popular JavaScript framework that simplifies DOM manipulation and event handling. In this case, the library is used for its selector functionality, which allows you to target specific elements in the DOM. **Special JavaScript Features/Syntax** There are no special JavaScript features or syntax being tested in this benchmark. **Other Considerations** When writing benchmarks like this one, it's essential to consider factors such as: * **Dependency injection**: Ensure that dependencies (e.g., libraries, modules) are properly injected into the test code. * **Test isolation**: Use techniques like sandboxing or isolating the DOM to prevent external influences on the benchmark results. * **Consistency**: Ensure that the testing environment is consistent across different runs and platforms. **Alternatives** If you wanted to modify this benchmark or create an alternative, here are some options: 1. **Use a different library**: Instead of jQuery, use another selector library like Sizzle or CSS Selectors. 2. **Change the test scenario**: Update the HTML structure or add more complex DOM queries to simulate real-world scenarios. 3. **Add additional factors**: Introduce other factors that affect performance, such as network latency or concurrent execution. 4. **Use a different programming language**: Translate the benchmark code into another language (e.g., C++, Java) to explore differences in performance. Feel free to ask if you have any further questions!
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