Benchmark: createElement vs cloneNode with option

Tests:

createElement
var list = [], n = 0; while(true) { n++; var o = document.createElement('option') o.value = n.toString() list.push(o); if(n===10000) break; }
cloneNode
var list = [], n = 0, node = document.createElement('option'); while(true) { n++; let o = node.cloneNode(false) o.value = n.toString() list.push(o); 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):

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Let's break down the provided JSON and explain what is tested, compared options, pros and cons of those approaches, and other considerations.

**Benchmark Definition**
The benchmark measures the performance difference between two ways to create new DOM elements: `createElement` and `cloneNode`. The goal is to find the faster approach for creating new elements before insertion into the DOM.

**Options Compared**

1. **createElement**: This method creates a new DOM element using the `document.createElement()` function.
2. **cloneNode**: This method clones an existing DOM node (in this case, the newly created `option` element) and returns it as a new, independent node.

**Pros and Cons of Each Approach**

* **createElement**
	+ Pros:
		- Creates a new, entirely separate DOM element from scratch.
		- More efficient when creating many elements with different attributes or styles.
	+ Cons:
		- May incur additional overhead due to the creation process.
		- Can lead to memory fragmentation if not managed properly.
* **cloneNode**
	+ Pros:
		- Creates a new node that is a copy of an existing node, which can be more efficient in terms of resources and memory usage.
		- Faster when creating many elements with similar attributes or styles.
	+ Cons:
		- Creates a new node that is a reference to the original node, rather than an entirely separate entity.
		- May lead to issues if the cloned node is modified later on.

**Library Used**
In this benchmark, `cloneNode` uses the `document.createElement()` function internally. This suggests that the browser's implementation of `cloneNode` relies on creating a new element using `createElement()`. However, the actual implementation details are not explicitly stated in the benchmark definition.

**Special JS Feature or Syntax**
There is no special JavaScript feature or syntax used in these test cases. The code only uses standard JavaScript syntax and features (e.g., `var`, `while`, `push`).

**Other Alternatives**

If `createElement` is too slow, another alternative could be to use a library like jQuery's `create()` function, which creates new DOM elements with options for attributes, styles, and more. However, this would likely add additional overhead due to the complexity of the library.

Another approach could be to use a custom solution that pre-allocates an array or buffer to store the elements, rather than creating them individually using `createElement` or `cloneNode`. This would require manual memory management but could potentially lead to better performance.

**Alternatives for cloneNode**

If `cloneNode` is too slow, another alternative could be to use a library like jQuery's `clone()` function, which creates new nodes with the same attributes and content as the original node. However, this would likely add additional overhead due to the complexity of the library.

Another approach could be to implement a custom solution that uses a binary tree or other data structure to store the cloned nodes, rather than creating them individually using `cloneNode`. This would require manual memory management but could potentially lead to better performance.

In summary, the benchmark measures the performance difference between two approaches to create new DOM elements: `createElement` and `cloneNode`. While `createElement` may be more suitable for creating many elements with different attributes or styles, it incurs additional overhead. `cloneNode`, on the other hand, creates a new node that is a copy of an existing node, which can be more efficient in terms of resources and memory usage.

Related benchmarks:

createElement vs cloneNode with option (version: 0)

Faster way to create new dom elements before insertion

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):