Benchmark: createElement vs cloneNode for comments

Tests:

createElement
var list = [], n = 0; while(true) { n++; list.push(document.createComment(' ')); if(n===100000) break; }
cloneNode
var list = [], n = 0, node = document.createComment(' '); while(true) { n++; list.push(node.cloneNode(true)); if(n===100000) break; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
createElement
cloneNode

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser/OS: Chrome 120 on Windows

View result in a separate tab

Test name	Executions per second
createElement	19.1 Ops/sec
cloneNode	86.6 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 JSON and explain what's being tested, compared, and discussed.

**Benchmark Purpose:**
The primary goal of this benchmark is to compare two approaches for creating new DOM elements:
	1. `document.createElement()` (createElement)
	2. `node.cloneNode(true)` (cloneNode)

**Options Compared:**

* **createElement**: Creates a new DOM element using the `document.createElement()` method.
	+ Pros: Can be used to create custom HTML elements, allows for more control over the element's attributes and content.
	+ Cons: May incur overhead due to parsing and serializing the element's properties.
* **cloneNode**: Creates a copy of an existing node (in this case, a comment) using the `node.cloneNode(true)` method.
	+ Pros: Faster and more lightweight than creating from scratch, as it reuses the existing node's attributes and content.
	+ Cons: Only creates a shallow copy, so modifying the cloned node would affect the original.

**Library Used:**
None (this benchmark is focused on basic DOM manipulation operations).

**Special JS Features/Syntax:**
The benchmark uses JavaScript loops (`while`) to create and push elements or clones into an array. This is not a special feature or syntax per se, but rather a simple way to generate large datasets for testing.

Now, let's examine the test cases:

1. **createElement**: Creates 100,000 new comment elements using `document.createElement()`.
2. **cloneNode**: Creates 100,000 clones of an existing comment element ( created initially with `document.createComment('')` ) using `node.cloneNode(true)`.

**Benchmark Results:**
The latest benchmark results show that the `cloneNode` approach is significantly faster than creating elements from scratch (`createElement`). The exact times are not provided, but the results suggest a substantial difference in performance between the two methods.

**Other Alternatives:**

* **Other DOM element creation methods**: Depending on the use case, other approaches might be more suitable, such as using `document Fragments` or `DocumentBuilderFactory`.
* **Using existing nodes**: Creating elements from an existing node (e.g., a fragment) can be faster and more efficient than creating new nodes.
* **Avoiding unnecessary cloning**: If the cloned nodes are not modified, there's no need to create clones at all.

Related benchmarks:

createElement vs cloneNode for comments (version: 0)

Faster way to create new dom elements before insertion

Comparing performance of: createElement vs cloneNode

Created: 2 years ago by: Registered User

Jump to the latest result

createElement

cloneNode

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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