Benchmark: Remove children test with list

HTML Preparation code:

<div id='messages'></div>

Script Preparation code:

let list = document.getElementById("messages");
for(i=0; i<1000; i++) {
	list.innerHTML += "<span>Text</span>"
}

Tests:

Remove firstChild
let list = document.getElementById("messages"); while (list.firstChild) { list.removeChild(list.firstChild); }
RemoveChildren
let list = document.getElementById("messages"); list.replaceChildren();

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Remove firstChild
RemoveChildren

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/100.0.4896.75 Safari/537.36

Browser/OS: Chrome 100 on Windows

View result in a separate tab

Test name	Executions per second
Remove firstChild	3185179.8 Ops/sec
RemoveChildren	2367089.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down what's being tested in the provided JSON data.

**What is being tested?**

The test cases are designed to measure the performance of removing children from an HTML list element. The tests are comparing two approaches:

1. **Remove firstChild**: This approach iterates over each child node of the list and removes it individually using `list.removeChild(list.firstChild)`.
2. **RemoveChildren**: This approach uses a single method call, `list.replaceChildren()`, to replace the entire content of the list element.

**Options compared**

The two approaches have different trade-offs:

* **Remove firstChild**:
	+ Pros: It's a straightforward and explicit way to remove each child node individually. This can be beneficial if you need to perform additional operations on each child node.
	+ Cons: It's slower because it involves iterating over each child node, which can lead to performance issues for large lists.
* **RemoveChildren**:
	+ Pros: It's faster because it uses a single method call that replaces the entire content of the list element. This can be beneficial for larger lists where iteration is not necessary.
	+ Cons: It may require more processing power and memory, as the browser needs to recreate the entire list element.

**Other considerations**

When choosing between these approaches, consider the following:

* If you need to perform additional operations on each child node, `Remove firstChild` might be a better choice.
* If you're working with large lists where performance is critical, `RemoveChildren` might be a better choice.
* However, if you're working with small lists or don't mind the extra processing power required by `RemoveChildren`, it might still be a viable option.

**Library used**

In this benchmark, none of the libraries are explicitly mentioned. However, it's likely that the `document.getElementById` and `list.innerHTML` methods are using the browser's built-in APIs for DOM manipulation.

**Special JS feature or syntax**

There is no special JavaScript feature or syntax being used in this benchmark. It's a straightforward test case that uses standard JavaScript methods to manipulate an HTML list element.

Now, regarding alternatives:

If you want to add more test cases or variations, here are some ideas:

* Compare the performance of using `Array.prototype.splice()` instead of `removeChild()`.
* Test the performance of removing children from a different type of element (e.g., `div`, `span`).
* Add additional operations before or after removing the children (e.g., sorting the list, applying styles to the children).
* Compare the performance of using Web Workers or other parallel computing techniques to speed up the benchmark.

Related benchmarks:

Remove children test with list (version: 0)

Comparing performance of: Remove firstChild vs RemoveChildren

Created: 2 years ago by: Guest

Jump to the latest result

Remove firstChild

RemoveChildren

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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