Benchmark: createElement vs cloneNode (no children)

Tests:

createElement
var list = [], n = 0; while(true) { n++; var div = document.createElement("div"); div.style.display = "inline-block"; div.style.color = "red"; list.push(div); if(n===100000) break; }
cloneNode
var list = [], n = 0, node = document.createElement("div"); node.style.display = "inline-block"; node.style.color = "red"; 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:

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

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks on MeasureThat.net.

**What is being tested?**

The provided benchmark compares two approaches to create new complex DOM elements: `document.createElement()` and `node.cloneNode(true)` (with no children).

**Options compared:**

There are two options being compared:

1. **`document.createElement()`**: This method creates a new HTML element from scratch, allowing for full customization of the element's attributes, styles, and content.
2. **`node.cloneNode(true)`**: This method creates a deep copy of an existing node, including all its child nodes and attributes.

**Pros and Cons:**

1. **`document.createElement()`**:
	* Pros:
		+ Allows for full customization of the element's attributes, styles, and content.
		+ Can be more efficient when creating complex elements with many attributes or styles.
	* Cons:
		+ Can lead to performance issues if too many elements are created in a short period.
2. **`node.cloneNode(true)`**:
	* Pros:
		+ Is generally faster than `document.createElement()` since it reuses the existing node's resources.
		+ Can be more efficient when creating complex elements with many child nodes or attributes.
	* Cons:
		+ Does not allow for full customization of the element's attributes, styles, and content (only modifies the existing node).
		+ May lead to performance issues if too many cloned nodes are created in a short period.

**Library usage:**

In this benchmark, `document` is used as the global object, which is the standard way to access DOM-related methods in JavaScript. No additional libraries are required for this test.

**Special JS feature or syntax:**

There are no special JavaScript features or syntaxes being used in this benchmark. The code is written in plain JavaScript and uses only standard DOM-related methods.

**Other considerations:**

When working with large amounts of DOM elements, it's essential to consider the following factors:

* **DOM traversal**: How do you traverse the DOM tree when searching for or manipulating elements? Techniques like querySelector, querySelectorAll, or Document.querySelector can impact performance.
* **Event handling**: Are you handling events on these elements, which can add overhead?
* **Layout and styling**: Are there any layout or styling concerns that need to be addressed?

**Alternatives:**

Other alternatives for creating complex DOM elements include:

1. **`DOMParser`**: Can parse HTML strings into a Document object, allowing for dynamic creation of elements.
2. **`JSDOM` library**: A JavaScript library that allows you to create and manipulate a simulated DOM environment in Node.js or the browser.

Keep in mind that each approach has its trade-offs, and the choice ultimately depends on your specific use case and performance requirements.

Related benchmarks:

createElement vs cloneNode (no children) (version: 0)

Faster way to create new complex dom elements

Comparing performance of: createElement vs cloneNode

Created: 4 years ago by: Guest

Jump to the latest result

createElement

cloneNode

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

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