Benchmark: Testing both ways to run conditions on getAttribute from a Node

HTML Preparation code:

<div id="test" data-media-type="gifv">
  lorem ipsum
</div>

Script Preparation code:

localName = 'img';
parentNode = document.getElementById('test');

Tests:

A
if (localName === "img" && (parentNode.getAttribute("data-media-type") === "video" || parentNode.getAttribute("data-media-type") === "gifv")) { // do stuff }
B
if (localName === "img" && ["video", "gifv"].includes(parentNode.getAttribute("data-media-type"))) { // do stuff }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
A
B

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:124.0) Gecko/20100101 Firefox/124.0

Browser/OS: Firefox 124 on Ubuntu

View result in a separate tab

Test name	Executions per second
A	452282336.0 Ops/sec
B	9537776.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the benchmark and its test cases to understand what's being tested.

**Benchmark Overview**

The benchmark is designed to compare two approaches for running conditions on the `getAttribute` method of an HTML element in a Node.js environment.

**HTML Preparation Code**

The provided HTML preparation code creates a simple web page with a `<div>` element that has an `id` attribute set to "test". The `data-media-type` attribute is also set to either "video" or "gifv".

```html
<div id="test" data-media-type="gifv">
  lorem ipsum
</div>
```

**Script Preparation Code**

The provided script preparation code sets a variable `localName` to the string "img", which will be used in both test cases.

```javascript
localName = 'img';
parentNode = document.getElementById('test');
```

**Test Cases**

There are two individual test cases:

**A**
```javascript
if (localName === "img" && (parentNode.getAttribute("data-media-type") === "video" || parentNode.getAttribute("data-media-type") === "gifv")) {
  // do stuff
}
```
This test case uses a traditional `if` statement with multiple conditions. It checks if the `localName` is equal to "img" and if either the `data-media-type` attribute is equal to "video" or "gifv".

**B**
```javascript
if (localName === "img" && ["video", "gifv"].includes(parentNode.getAttribute("data-media-type"))) {
  // do stuff
}
```
This test case uses an array inclusion check (`includes()` method) instead of a traditional `if` statement with multiple conditions. It checks if the `localName` is equal to "img" and if the value of the `data-media-type` attribute is included in the array ["video", "gifv"].

**Pros and Cons**

Here are some pros and cons of each approach:

* **Traditional `if` statement with multiple conditions (A)**:
	+ Pros: Easy to understand, easy to maintain.
	+ Cons: Can be slow due to the repeated function calls for the attribute access.
* **Array inclusion check (`includes()` method) (B)**:
	+ Pros: Faster than traditional `if` statements, as it avoids repeated function calls.
	+ Cons: May not be as easy to understand for beginners.

**Library and Special JavaScript Features**

There is no library used in this benchmark. However, the test cases do utilize special JavaScript features:

* **Template literals**: The script preparation code uses a template literal to set the `localName` variable.
* **Arrow functions**: Although not explicitly mentioned, arrow functions are implied by the concise syntax of the benchmark definitions.

**Other Alternatives**

Some other approaches could be explored for running conditions on the `getAttribute` method:

* Using a regular expression to match against the attribute value
* Using a switch statement with multiple cases
* Using a custom function or module to abstract away the attribute access

However, these alternatives might not provide any significant performance benefits over the traditional `if` statements and array inclusion checks used in the benchmark.

Related benchmarks:

Testing both ways to run conditions on getAttribute from a Node (version: 0)

Comparing performance of: A vs B

Created: 2 years ago by: Guest

Jump to the latest result

A

B

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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