Benchmark: find vs selector test

HTML Preparation code:

<a id="parent" >
  <span id="child">Need span</span>
  <svg class="icon md-16 icon-shevron-right text-muted"></svg>
</a>
<script src='https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.js'></script>

Script Preparation code:

var $element = $("#parent");

Tests:

1
$element.find("span");
2
$("#parent span");

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
1
2

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what's being tested, compared, and considered.

**Benchmark Definition**

The benchmark definition consists of two test cases:

1. `find("span")`: This test case is using jQuery's `.find()` method to select all elements with the tag name "span" within the element with the id "parent".
2. `$("#parent span")`: This test case is using jQuery's `$` function and the attribute selector syntax `"#parent span"` to select the direct child element with the id "child" (a span) of the element with the id "parent".

**Comparison**

The two test cases are being compared in terms of their performance, specifically how quickly each method can execute.

**Options Compared**

* `.find()` vs. attribute selector syntax `$("#parent span")`

**Pros and Cons**

### `.find()`

Pros:

* Allows for more flexibility in selecting elements within a container
* Can handle nested selections

Cons:

* May be slower due to the additional overhead of traversing the DOM tree
* Requires jQuery to be included in the HTML file (as seen in the benchmark preparation code)

### Attribute Selector Syntax `$("#parent span")`

Pros:

* Faster execution, as it directly accesses the element by its attribute value
* Does not require jQuery to be included in the HTML file

Cons:

* Less flexible than `.find()`, as it only selects elements with a specific id and tag name
* May not work correctly if the element is not found or is dynamically created

**Library**

The `jQuery` library is being used in both test cases. Its primary purpose is to simplify DOM manipulation and provide a convenient way to select elements on the page.

In this benchmark, jQuery is used to execute the two test cases. The `$(selector)` syntax is used to wrap around the selector string, which allows for easy chaining of multiple selectors together (e.g., `$("#parent span")`).

**Special JS Feature or Syntax**

There are no special JavaScript features or syntaxes being tested in this benchmark.

**Other Considerations**

* The benchmark is using a fixed set of browsers and platforms to ensure consistent results.
* The test cases are relatively simple, focusing on basic DOM selection methods. More complex scenarios would require additional factors like event handling, asynchronous execution, or other modern JavaScript features.

**Alternatives**

If you were to create similar benchmarks, you could explore other approaches:

1. Using vanilla JavaScript instead of jQuery: This would allow for a more lightweight and flexible test suite.
2. Adding more complex DOM selection methods, such as `.filter()` or `querySelectorAll()`, to compare with `.find()` and attribute selector syntax.
3. Incorporating asynchronous execution patterns, like callbacks or promises, to simulate real-world scenarios where DOM updates may be delayed.

Keep in mind that the specific approaches and alternatives will depend on your goals and requirements for the benchmark.

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/102.0.5005.61 Safari/537.36

Browser/OS: Chrome 102 on Mac OS X 10.13.6

View result in a separate tab

Test name	Executions per second
1	1209485.9 Ops/sec
2	478333.6 Ops/sec

Related benchmarks:

find vs selector test (version: 0)

Comparing performance of: 1 vs 2

Created: 2 years ago by: Guest

Jump to the latest result

1

2

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):