Benchmark: append vs appendChild Many

HTML Preparation code:

<div id="target"></div>

Script Preparation code:

var target = document.getElementById('target');
var dummies = [
	document.createElement('p'),
  document.createElement('p'),
  document.createElement('p'),
  document.createElement('p'),
  document.createElement('p')
];

Tests:

append
target.append(...dummies)
appendChild
dummies.forEach(dummy => target.appendChild(dummy))

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 25 days ago):

LLMs can make mistakes. Check important info.

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

**Benchmark Definition**

The benchmark definition represents a JavaScript function that appends multiple elements (`dummies`) to an HTML element (`target`). The two benchmark definitions are:

1. `target.append(...dummies)`: This tests the built-in `append` method of the `Element` interface in JavaScript.
2. `dummies.forEach(dummy => target.appendChild(dummy))`: This tests the `appendChild` method, which is used to add a child node to an element.

**Script Preparation Code**

The script preparation code creates an HTML element (`target`) with an ID of "target" and an array of dummy elements (`dummies`). The `dummies` array contains five `p` elements created using the `document.createElement` method.

**Html Preparation Code**

The HTML preparation code provides a basic HTML structure with a single `div` element that has an ID of "target". This element will serve as the target for appending the dummy elements.

**Library and Special JS Features**

Neither of the benchmark definitions uses any external libraries. However, it's worth noting that the `Element` interface and the `appendChild` method are part of the standard JavaScript API, which means they are widely supported across different browsers.

There are no special JavaScript features or syntax used in these benchmarks. They rely on standard JavaScript methods and interfaces to achieve their test cases.

**Options Compared**

The two benchmark definitions compare the performance of the built-in `append` method versus the `appendChild` method for appending multiple elements to an HTML element.

**Pros and Cons**

Here's a brief summary of the pros and cons of each approach:

1. `target.append(...dummies)`:
	* Pros: Simple, concise, and optimized for performance.
	* Cons: May not be compatible with older browsers that don't support the `append` method.
2. `dummies.forEach(dummy => target.appendChild(dummy))`:
	* Pros: Widely supported across different browsers, as it's a standard JavaScript method.
	* Cons: May be slower than the optimized `append` method due to the overhead of iterating over the array.

**Other Considerations**

When choosing between these two approaches, consider the following factors:

1. Browser compatibility: If you need to support older browsers that don't support the `append` method, the second approach might be a better choice.
2. Performance: If you're optimizing for performance, the first approach is likely to be faster due to its optimized implementation.

**Alternatives**

If you want to test other approaches or explore variations of these benchmarks, here are some alternatives:

1. Use a different array method, such as `concat` or `push`, instead of `append`.
2. Test the performance of using `insertAdjacentHTML` instead of appending elements.
3. Compare the performance of using a library like jQuery to append elements versus native JavaScript methods.

Feel free to ask if you have any further questions or need more specific guidance on implementing these alternatives!

Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4484.7 Safari/537.36 OPR/78.0.4072.0 (Edition developer)

Browser/OS: Opera 78 on Windows

View result in a separate tab

Test name	Executions per second
append	95277.4 Ops/sec
appendChild	87879.7 Ops/sec

Related benchmarks:

append vs appendChild Many (version: 1)

Comparing performance of: append vs appendChild

Created: 3 years ago by: Registered User

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 25 days ago):