Benchmark: 11 JS: append vs appendChild 2zzc

HTML Preparation code:

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

Script Preparation code:

var container = document.getElementById("container");
var paragraph = document.createElement("p");
var paragraph2 = document.createElement("p");

Tests:

append
container.append(paragraph);
appendChild
container.appendChild(paragraph2);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
append
appendChild

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 and its test cases.

**Benchmark Overview**

The benchmark measures the performance difference between using the `append` method versus the `appendChild` method to add elements to a HTML container in JavaScript. The benchmark uses a simple HTML structure with two paragraphs created dynamically.

**Script Preparation Code**

The script preparation code creates a container element in the HTML document using `document.getElementById("container")`. Then, it creates two paragraph elements using `document.createElement("p")`, which are assigned to variables `paragraph` and `paragraph2`.

**Html Preparation Code**

The HTML preparation code defines the basic structure of the HTML document with an empty `<div>` element with the id "container".

**Test Cases**

There are two test cases:

1. **append**: This test case measures the performance of appending a single paragraph element to the container using `container.append(paragraph);`.
2. **appendChild**: This test case measures the performance of appending a second paragraph element to the container using `container.appendChild(paragraph2);`.

**Library Used**

The benchmark uses no specific libraries, as it only relies on built-in JavaScript features.

**Special JS Features/Syntax**

There are none mentioned in this particular benchmark. However, it's worth noting that the use of `append` and `appendChild` methods is a common way to add elements to an HTML container in JavaScript.

**Pros and Cons of Different Approaches**

1. **Append vs AppendChild**:
	* **Append**: This method modifies the internal structure of the DOM by adding the new element as the last child of the parent element. It's generally faster than `appendChild` because it doesn't require a full traversal of the DOM.
	* **AppendChild**: This method is similar to `append`, but it creates a clone of the child node and adds the clone to the end of the parent element. This can lead to more efficient rendering in some cases, especially when working with complex DOM structures.
2. **Benefits of using AppendChild**:
	* Better performance for large or complex DOM structures
	* More accurate rendering of cloned nodes
3. **Drawbacks of using AppendChild**:
	* Can be slower than `append` for small or simple DOM structures
	* May lead to unnecessary node cloning and garbage collection

In general, if you're working with simple HTML structures and don't need to optimize for performance, `append` might be a better choice. However, if you're dealing with complex DOM structures or need precise control over the rendering process, `appendChild` might be a better option.

**Other Alternatives**

1. **InsertBefore**: This method inserts a new element before a specified child node in the DOM.
2. **InsertAfter**: This method inserts a new element after a specified child node in the DOM.
3. **DOM Manipulation Libraries**: There are several libraries available that provide alternative methods for manipulating the DOM, such as jQuery or React. These libraries often offer optimized methods for adding elements to the DOM.

I hope this explanation helps!

Latest run results:

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

User agent: Mozilla/5.0 (Android 10; Mobile; rv:107.0) Gecko/107.0 Firefox/107.0

Browser/OS: Firefox Mobile 107 on Android

View result in a separate tab

Test name	Executions per second
append	17753.6 Ops/sec
appendChild	18643.5 Ops/sec

Related benchmarks:

11 JS: append vs appendChild 2zzc (version: 0)

asc

Comparing performance of: append vs appendChild

Created: 2 years ago by: Guest

Jump to the latest result

append

appendChild

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):