Benchmark: JQuery: test find by class

HTML Preparation code:

<div id="container">
  <div class="row"></div>
  <div class="row"></div>
  <div class="row"></div>
  <div class="row"></div>
  <div class="row"></div>
  <div class="row"></div>
  <div class="row"></div>
  <div class="row"></div>
  <div class="row"></div>
  <div class="row"></div>
</div>
<script src='https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.js'></script>

Script Preparation code:

var container = $("#container");

Tests:

container.find("div.row")
container.find("div.row");
container.find(".row")
container.find(".row");
$(".row")
$(".row");

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
container.find("div.row")
container.find(".row")
$(".row")

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 4 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Firefox/78.0

Browser/OS: Firefox 78 on Windows

View result in a separate tab

Test name	Executions per second
container.find("div.row")	125836.8 Ops/sec
container.find(".row")	257930.9 Ops/sec
$(".row")	233282.1 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided JSON and benchmark preparation code.

**What is tested?**

The provided test case measures the performance of finding elements by class using jQuery in different ways:

1. `container.find("div.row");`: This tests the performance of using the `.find()` method to select elements with a specific CSS class.
2. `$(".row");`: This tests the performance of using the `$()` function to select elements with a specific CSS class (note that this is an alias for jQuery's `$(selector)` method).
3. `container.find(".row");`: This tests the performance of using the `.find()` method to select elements with a dot (`.`) followed by the CSS class name.

**Options compared**

The two options being compared are:

1. Using the `.find()` method (`container.find("div.row")` and `container.find(".row")`)
2. Using the `$()` function with a selector (`$(".row")`)

**Pros and cons of each approach:**

* **Using the `.find()` method**: This approach is generally considered more efficient than using the `$()` function with a selector because it allows jQuery to perform a more specific CSS class search.
	+ Pros: Can be faster for large datasets, provides more flexibility in selecting elements.
	+ Cons: May require more code to write, can be less intuitive for developers familiar with other DOM manipulation methods.
* **Using the `$()` function with a selector**: This approach is often considered simpler and more concise than using the `.find()` method.
	+ Pros: Easier to read and write, can be faster in some cases (e.g., when working with simple selectors).
	+ Cons: May not perform as well on large datasets or complex CSS class structures.

**Library and its purpose**

The provided test case uses jQuery, a popular JavaScript library for DOM manipulation, event handling, and other tasks. jQuery's `$()` function is used to select elements in the HTML document, and its `.find()` method is used to search for descendants with a specific CSS class.

**Special JS features or syntax**

There doesn't appear to be any special JavaScript features or syntax being tested in this benchmark (e.g., async/await, promises, etc.).

**Other alternatives**

If you wanted to compare the performance of finding elements by class using other libraries or methods, some alternatives could include:

* Using a vanilla JavaScript method like `document.querySelectorAll()` instead of jQuery's `$()`.
* Comparing the performance of different CSS selectors (e.g., `div.row`, `.row`, `#container .row`).
* Testing the performance of using a different library or framework for DOM manipulation and event handling.

Related benchmarks:

JQuery: test find by class (version: 0)

Test find by class.

Comparing performance of: container.find("div.row") vs container.find(".row") vs $(".row")

Created: 4 years ago by: Guest

Jump to the latest result

container.find("div.row")

container.find(".row")

$(".row")

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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