Benchmark: htmlparser2@6.1.0 vs DOMParser

HTML Preparation code:

<script type="text/javascript" src="https://tosmolkadev.blob.core.windows.net/public/htmlparser2-6.1.0.js"></script>

Script Preparation code:

window.testCase = 'test <a href="https://microsoft.com">link</a>';

Tests:

htmlparser2
const result = htmlparser2.DomUtils.getOuterHTML(htmlparser2.parseDOM(testCase));
DOMParser
const result = ((new DOMParser()).parseFromString(testCase, "text/html")).body.innerHTML;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
htmlparser2
DOMParser

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 10 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/137.0.0.0 Safari/537.36

Browser/OS: Chrome 137 on Windows

View result in a separate tab

Test name	Executions per second
htmlparser2	0.0 Ops/sec
DOMParser	132472.2 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 provided benchmark definition and test cases.

**Benchmark Definition**

The benchmark is comparing two JavaScript libraries: `htmlparser2` (version 6.1.0) and `DOMParser`. The purpose of this benchmark is to measure which library performs better in parsing HTML strings.

**Script Preparation Code**

The script preparation code sets up the test environment by creating a variable `testCase` that contains an HTML string with a link: `<a href="https://microsoft.com">link</a>`.

**Html Preparation Code**

The HTML preparation code includes a script tag that loads the `htmlparser2-6.1.0.js` file, which is a version of the `htmlparser2` library being tested.

**Individual Test Cases**

There are two test cases:

### Test Case 1: htmlparser2

This test case uses the `htmlparser2` library to parse the HTML string and extract the outer HTML using the `DomUtils.getOuterHTML()` method.

### Test Case 2: DOMParser

This test case uses the `DOMParser` API to parse the HTML string and extract the inner HTML using the `parseFromString()` method. The `parseFromString()` method takes two arguments: the HTML string as a parameter, and a MIME type (`"text/html"` in this case).

**Pros and Cons of Different Approaches**

Here's a brief overview of the pros and cons of each approach:

1. **htmlparser2**: Advantages:
	* Might be more lightweight and efficient for parsing HTML.
	* Allows for customization through methods like `DomUtils.getOuterHTML()`.
	Disadvantages:
	* Might not handle edge cases as well as `DOMParser` can.
2. **DOMParser**: Advantages:
	* Well-supported by most modern browsers, making it a safe choice for cross-browser compatibility.
	* Handles edge cases and provides robust parsing capabilities.
Disadvantages:
	* Can be heavier due to its built-in DOM creation.
	* Limited control over the parsing process.

**Library: htmlparser2**

`htmlparser2` is a lightweight JavaScript library designed for parsing HTML strings. It's not part of the standard DOM API and requires loading a separate script file (`htmlparser2-6.1.0.js`). The library provides methods like `DomUtils.getOuterHTML()` that can be used to extract specific parts of an HTML document.

**Special JS Feature: Async/Await**

The test cases use async/await syntax, which is a modern JavaScript feature that allows for cleaner and more readable asynchronous code. This feature was introduced in ECMAScript 2017 (ES2017) and has since become widely adopted.

**Other Alternatives**

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

1. `jsdom`: A popular library that provides a virtual DOM implementation, allowing for easy parsing and manipulation of HTML documents.
2. `cheerio`: A fast and lightweight HTML parser that's similar to `htmlparser2` but with more features and a larger community.
3. `XMLHttpRequest`: An older API that allows for asynchronous loading of HTML documents from a server.

These alternatives might offer different trade-offs in terms of performance, compatibility, or feature set, so it's essential to evaluate each option based on your specific use case and requirements.

Related benchmarks:

htmlparser2@6.1.0 vs DOMParser (version: 0)

Comparing performance of: htmlparser2 vs DOMParser

Created: 3 years ago by: Registered User

Jump to the latest result

htmlparser2

DOMParser

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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