Benchmark: Test js find selector by koko

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:

Use find
$element.find("#child");
Use id
$("#child");

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Use find
Use id

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

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Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

LLMs can make mistakes. Check important info.

Let's break down the provided JSON data and explain what is being tested, compared, and some pros/cons of different approaches.

**Benchmark Definition**

The benchmark definition represents a specific JavaScript code snippet that is to be executed multiple times. In this case, we have two test cases:

1. `Use find`: This test case uses the `find` method on the `$element` variable, passing the string `"#child"` as an argument.
2. `Use id`: This test case uses a dollar sign (`$`) prefixed with the string `"#"`, followed by the child element's ID `"child"`. This is equivalent to using the `find` method.

**Html Preparation Code and Script Preparation Code**

The provided HTML code sets up an `<a>` element with an ID of `"parent"` that contains another `<span>` element with an ID of `"child"`. The JavaScript script preparation code loads jQuery (version 3.4.1) using a CDN, which is likely included to enable the `$` variable.

**Comparison**

The two test cases compare the performance differences between using `find` and using the `#` prefix (equivalent to `find`) when searching for an element by its ID.

**Pros and Cons of Different Approaches:**

1. **Using `find`:**
	* Pros:
		+ More readable and maintainable code, as it clearly conveys the intention of finding a specific element within the DOM.
		+ Less likely to result in performance regressions due to incorrect usage.
	* Cons:
		+ May be slower than using the `#` prefix due to additional checks performed by jQuery's selector engine.
2. **Using `$("#child")`:**
	* Pros:
		+ Faster execution, as it bypasses some of jQuery's internal checks and directly accesses the DOM element.
	* Cons:
		+ Less readable and maintainable code, as it may lead to confusion about the intentions behind the usage.

**Library:**

The library being used here is jQuery, a popular JavaScript library for DOM manipulation and event handling. The `$(` symbol is an alias for the `$` variable, which allows developers to use a more familiar syntax while still leveraging jQuery's functionality.

**Special JS Feature or Syntax:**

There are no special features or syntaxes mentioned in this benchmark.

**Alternatives:**

If you prefer not to use jQuery, you can also consider using vanilla JavaScript DOM methods, such as `document.getElementById()` for element lookup. This approach would eliminate the need for a library like jQuery.

Keep in mind that performance differences between these approaches may be minimal and dependent on specific use cases. It's always recommended to profile and benchmark your code before making optimizations.

Related benchmarks:

Test js find selector by koko (version: 0)

Comparing performance of: Use find vs Use id

Created: 2 years ago by: Guest

Jump to the latest result

Use find

Use id

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):