Benchmark: JQuery: test find by tag vs find by class for non-document element

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.js'></script>

Script Preparation code:

var element = $(`<div><a id="tr_1" class="c-1">
            <svg id="tr_2" class="c-2"></svg>
            <span id="tr_3" class="c-3"></span>
			<svg></svg>
            <div id="tr_4" class="c-4">
            </div>
            </div>`);

Tests:

find by tag (if it possible)
element.find("a"); element.find("#tr_2"); element.find("span"); element.find("div");
find by class
element.find("c-1"); element.find("c-2"); element.find("c-3"); element.find("c-4");

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
find by tag (if it possible)
find by class

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

This benchmark does not have any results yet. Be the first one to run it!

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

LLMs can make mistakes. Check important info.

Let's dive into the explanation of what is being tested in this benchmark.

**Benchmark Overview**

The benchmark measures the performance difference between two ways to select elements in jQuery: `find()` by tag name and `find()` by class name, specifically when no document element is present.

**Options Compared**

Two options are compared:

1. **`element.find("a");`**: This option uses the `find()` method with a tag name selector (`"a"`). The idea behind this approach is to find an element with the `a` tag name within the DOM.
2. **`element.find("#tr_1");` and other class selectors**: This option uses the `find()` method with class name selectors (`"c-1"`, `"c-2"`, etc.). The idea behind this approach is to find an element with any of the specified classes.

**Pros and Cons**

The pros of using `find()` by tag name are:

* Simplicity: This approach is straightforward and easy to understand.
* Flexibility: Tag names can be more flexible than class names, as they don't require a specific naming convention.

However, there are some cons:

* Performance: When no document element is present, the browser needs to search through the entire DOM to find an element with the specified tag name. This can lead to slower performance.
* Browser behavior: Different browsers may behave differently when using `find()` by tag name, which can affect performance.

The pros of using `find()` by class name are:

* Efficiency: When no document element is present, the browser only needs to search through elements with the specified classes. This can lead to faster performance.
* Consistency: Browsers tend to behave more consistently when using class name selectors.

However, there are some cons:

* Complexity: Class name selectors can be more complex and harder to understand than tag name selectors.
* Limitations: Class names require a specific naming convention (e.g., `c-1`, `c-2`, etc.), which can limit flexibility.

**Library**

The benchmark uses the jQuery library, which is a popular JavaScript library for DOM manipulation and event handling. The `find()` method is a core part of the jQuery API, allowing developers to select elements based on various criteria.

**Special JS Feature or Syntax**

There are no special JS features or syntax used in this benchmark, as it primarily focuses on comparing two simple selection methods within the jQuery library.

**Other Alternatives**

If you're interested in exploring other alternatives, here are a few options:

* **`document.querySelector()`**: This method is similar to `find()` but uses a CSS selector instead of a tag name or class name. It's more flexible and powerful than `find()`, but can be slower for simple use cases.
* **`querySelectorAll()`**: This method returns an array of elements that match the specified CSS selector. It's similar to `document.querySelector()`, but returns all matches instead of just one.

Keep in mind that these alternatives may have different performance characteristics and require more expertise to use effectively.

Related benchmarks:

JQuery: test find by tag vs find by class for non-document element (version: 0)

check which selector is better for non-document element

Comparing performance of: find by tag (if it possible) vs find by class

Created: 5 years ago by: Guest

Jump to the latest result

find by tag (if it possible)

find by class

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):