Benchmark: jquerySelector vs getElementById

HTML Preparation code:

<div id="testElement"></div>
<script src='https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js'></script>

Script Preparation code:

var el = $('#testElement');
var className = el.className;

Tests:

jquerySelector
var el = $('#testElement'); var className = el.className;
getElementById
var el = document.getElementById('testElement'); var className = el.className;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
jquerySelector
getElementById

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 29 days ago):

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and its results to understand what is being tested, compared, and analyzed.

**Benchmark Definition:**

The benchmark measures the performance difference between two approaches:

1. `jquerySelector`: This approach uses jQuery's selector syntax (`#testElement`) to retrieve an element.
2. `getElementById`: This approach uses the native JavaScript method `document.getElementById` to retrieve an element by its ID.

**Script Preparation Code and Html Preparation Code:**

The script preparation code defines a variable `el` that represents the retrieved element, and then extracts its class name (`className`). The HTML preparation code includes a `<div>` element with the id "testElement", along with a reference to jQuery's library.

**Library:**

In this benchmark, jQuery is used as a library. jQuery is a popular JavaScript framework that provides an easy-to-use API for DOM manipulation, event handling, and other tasks. In this case, it's used to simplify the selector syntax (`#testElement`) and provide a way to access elements by their class name.

**Special JS Features or Syntax:**

None of the approaches in this benchmark use any special JavaScript features or syntax that are not widely supported across different browsers.

**Pros and Cons of Different Approaches:**

**jquerySelector (jQuery-based):**

Pros:

* Easier to read and maintain, thanks to jQuery's concise syntax.
* Can work with more complex selector syntax.

Cons:

* Adds an additional dependency on the jQuery library.
* May have a slight performance overhead due to the library's execution time.

**getElementById (Native JavaScript):**

Pros:

* No additional dependencies or overhead.
* Native JavaScript implementation is typically faster and more efficient.

Cons:

* Requires a deeper understanding of the DOM and its structure.
* May be less readable, especially for complex element selections.

**Benchmark Results:**

The benchmark results show that `document.getElementById` outperformed `jquerySelector` in terms of executions per second. This suggests that the native JavaScript approach is faster than the jQuery-based approach in this specific scenario.

Other Alternatives:

If you're interested in exploring alternative approaches or libraries, here are a few options:

* **Vanilla JavaScript:** You can use only vanilla JavaScript (without any libraries) to achieve similar results.
* **Cypress Testing Framework:** Cypress is a popular testing framework that provides a way to write tests and benchmark performance using its own API.
* **Benchmarking libraries:** There are several benchmarking libraries available, such as BenchmarkJS or Microbenchmark, which provide a way to compare the performance of different algorithms and approaches.

Keep in mind that these alternatives may not be directly applicable to this specific benchmark, but they can be useful for exploring other testing and benchmarking scenarios.

Latest run results:

Run details: (Test run date: 5 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/12.1.2 Safari/605.1.15

Browser/OS: Safari 12 on Mac OS X 10.14.6

View result in a separate tab

Test name	Executions per second
jquerySelector	3167706.5 Ops/sec
getElementById	3954619.8 Ops/sec

Related benchmarks:

jquerySelector vs getElementById (version: 0)

Comparing performance of jquerySelector vs getElementById

Comparing performance of: jquerySelector vs getElementById

Created: 5 years ago by: Guest

Jump to the latest result

jquerySelector

getElementById

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 29 days ago):