Benchmark: Add styles via cloneNode vs. createElement

HTML Preparation code:

<head><style>h1 { color: red; }</style></head><body></body>

AخA
 
<head><style>h1 { color: red; }</style></head><body></body>

Script Preparation code:

var head = document.querySelector("head");
var node = document.querySelector("style");

 
var head = document.querySelector("head");var node = document.querySelector("style");

Tests:

clodeNode
var clone = node.cloneNode({deep: true}) head.appendChild(clone);
var clone = node.cloneNode({deep: true})
head.appendChild(clone);
createElement
var clone = document.createElement("style"); clone.textContent = node.textContent; head.appendChild(clone);
var clone = document.createElement("style");
clone.textContent = node.textContent;
head.appendChild(clone);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Experimental features:

Memory measurements supported only in Chrome.
For precise memory measurements Chrome must be launched with --enable-precise-memory-info flag.
More information: Monitoring JavaScript Memory

Test case name	Result
clodeNode
createElement

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 9 days ago)

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:137.0) Gecko/20100101 Firefox/137.0

Browser/OS: Firefox 137 on Linux

View result in a separate tab

Test name	Executions per second
clodeNode	466.7 Ops/sec
createElement	447.8 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated 6 months ago):

Let's break down the provided benchmark definition and test cases.

Benchmark Definition

The benchmark measures the performance of two approaches to add styles to an HTML document:

Clone Node: Using cloneNode() method to create a copy of the existing <style> element, and then appending it to the <head> element.
Create Element: Creating a new <style> element using document.createElement(), setting its content to the original element's content using textContent, and then appending it to the <head> element.

Options Compared

The two approaches compared are:

cloneNode vs. createElement: These are the two methods used to create a new copy of the existing <style> element.
Deep Clone (true) vs. Shallow Copy (false): The cloneNode() method allows for both deep and shallow clones. In this benchmark, the test uses a deep clone (deep: true).

Pros and Cons

Clone Node:
- Pros:
  - Can preserve more of the original element's structure and content.
  - May be faster for complex elements or large documents.
- Cons:
  - Can lead to increased memory usage due to the creation of a new element tree.
Create Element:
- Pros:
  - Uses less memory since it creates a shallow copy of the element's content.
  - May be faster for simple elements or small documents.
- Cons:
  - Preserves less of the original element's structure and content.

Library

The cloneNode() method is part of the DOM (Document Object Model) API, which is used to manipulate HTML documents. It allows creating a copy of an existing node in the document tree.

Special JS Feature/Syntax

None mentioned in this benchmark. However, it's worth noting that other JavaScript features like async/await or promise chaining might be used in more complex scripts, but they are not relevant to this specific benchmark.

Other Alternatives

If you want to explore alternative approaches, here are a few options:

innerHTML: Instead of using cloneNode() or createElement(), you could use the innerHTML property to set the content of an element. However, be aware that this method can lead to security issues if used with untrusted data.
String interpolation: You could also concatenate strings to create a new <style> element, like "var clone = document.createElement('style'); clone.textContent = node.textContent; head.appendChild(clone);".

Keep in mind that the performance differences between these approaches might be negligible for simple use cases, but can add up for complex or large-scale applications.

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark definition and test cases.

**Benchmark Definition**

The benchmark measures the performance of two approaches to add styles to an HTML document:

1. **Clone Node**: Using `cloneNode()` method to create a copy of the existing `<style>` element, and then appending it to the `<head>` element.
2. **Create Element**: Creating a new `<style>` element using `document.createElement()`, setting its content to the original element's content using `textContent`, and then appending it to the `<head>` element.

**Options Compared**

The two approaches compared are:

* **cloneNode vs. createElement**: These are the two methods used to create a new copy of the existing `<style>` element.
* **Deep Clone (true) vs. Shallow Copy (false)**: The `cloneNode()` method allows for both deep and shallow clones. In this benchmark, the test uses a deep clone (`deep: true`).

**Pros and Cons**

1. **Clone Node**:
	* Pros:
		+ Can preserve more of the original element's structure and content.
		+ May be faster for complex elements or large documents.
	* Cons:
		+ Can lead to increased memory usage due to the creation of a new element tree.
2. **Create Element**:
	* Pros:
		+ Uses less memory since it creates a shallow copy of the element's content.
		+ May be faster for simple elements or small documents.
	* Cons:
		+ Preserves less of the original element's structure and content.

**Library**

The `cloneNode()` method is part of the DOM (Document Object Model) API, which is used to manipulate HTML documents. It allows creating a copy of an existing node in the document tree.

**Special JS Feature/Syntax**

**Other Alternatives**

If you want to explore alternative approaches, here are a few options:

* **innerHTML**: Instead of using `cloneNode()` or `createElement()`, you could use the `innerHTML` property to set the content of an element. However, be aware that this method can lead to security issues if used with untrusted data.
* **String interpolation**: You could also concatenate strings to create a new `<style>` element, like `"var clone = document.createElement('style'); clone.textContent = node.textContent; head.appendChild(clone);"`.

Keep in mind that the performance differences between these approaches might be negligible for simple use cases, but can add up for complex or large-scale applications.

Related benchmarks:

Add styles via cloneNode vs. createElement (version: 0)

Comparing performance of: clodeNode vs createElement

Created: 4 years ago by: Guest

Jump to the latest result

clodeNode

createElement

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 6 months ago):