Benchmark: change id vs appendChild

HTML Preparation code:

<div id="container"><div id="two"></div></div>

Script Preparation code:

var container = document.getElementById("container");
var two = document.getElementById("two");
var paragraph = document.createElement("p");

Tests:

change id
two.id="three"
appendChild
container.appendChild(paragraph);
insertBefore
container.insertBefore(paragraph, container.lastChild);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
change id
appendChild
insertBefore

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

Let's break down the benchmark definition and test cases to understand what's being tested.

**Benchmark Definition:**
The benchmark is defined as a JSON object with several properties:

* `Name`: A unique name for the benchmark.
* `Description`: An optional description of the benchmark, which is empty in this case.
* `Script Preparation Code`: A JavaScript code snippet that sets up the environment for the benchmark. In this case, it creates three elements: `container`, `two`, and `paragraph`.
* `Html Preparation Code`: The HTML code that defines the structure of the webpage where the benchmark will run. It consists of a single `<div>` element with two child elements, one of which is `container`.

**Individual Test Cases:**
The benchmark includes three test cases:

1. **change id**: This test case changes the value of `two.id` to `"three"`.
2. **appendChild**: This test case appends a new element (`paragraph`) to the end of the `container` element.
3. **insertBefore**: This test case inserts the `paragraph` element before the last child element of the `container` element.

**Pros and Cons of Different Approaches:**

* **change id**:
	+ Pros: Changing the ID of an element is a relatively simple operation that doesn't require any DOM manipulation.
	+ Cons: It may not be as efficient or effective as other methods, especially if the element needs to be updated frequently.
* **appendChild**:
	+ Pros: Appending elements is often faster than inserting them at specific positions, as it reduces the need for searching and rearranging child nodes.
	+ Cons: If the container has many children, appending elements can lead to inefficient memory usage and slow performance.
* **insertBefore**:
	+ Pros: Inserting elements before other elements can be more efficient than appending them, especially in cases where the insertion point is known.
	+ Cons: It requires more complex logic and may lead to slower performance if not implemented correctly.

**Library Used:**
There doesn't appear to be any specific library used in this benchmark. However, it's worth noting that `document.getElementById` and `document.createElement` are part of the DOM API, which is a fundamental building block of web development.

**Special JS Features/Syntax:**
This benchmark does not explicitly use any special JavaScript features or syntax. However, it's worth noting that some browsers may optimize certain operations more effectively than others due to their implementation details (e.g., V8 in Chrome).

**Alternatives:**
If you're interested in running this benchmark on other platforms or with different versions of JavaScript, there are several alternatives:

1. Node.js: You can run the benchmark using Node.js, which provides a similar DOM API and can execute JavaScript code.
2. Browser-specific benchmarks: Other browsers like Firefox, Safari, or Edge might have their own benchmarking tools that could be used to run this benchmark.
3. Emulators: You could use JavaScript emulators like V8 or SpiderMonkey to run the benchmark on different platforms or architectures.

Keep in mind that running these alternatives may require some modifications to the benchmark code and setup.

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/118.0.0.0 Safari/537.36

Browser/OS: Chrome 118 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
change id	14679299.0 Ops/sec
appendChild	4190501.0 Ops/sec
insertBefore	3516700.0 Ops/sec

Related benchmarks:

change id vs appendChild (version: 2)

Comparing performance of: change id vs appendChild vs insertBefore

Created: one year ago by: Registered User

Jump to the latest result

change id

appendChild

insertBefore

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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