Benchmark: replaceChild vs replaceChildren vs documentFragment 3

HTML Preparation code:

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

Script Preparation code:

var elements = [document.createElement('div'), document.createElement('div')];
var fragment = document.createDocumentFragment();
var container = document.getElementById('container');

elements.forEach(element => fragment.appendChild(element));
container.appendChild(fragment);

Tests:

replaceChild
var changeIndex = 1; elements[changeIndex] = document.createElement('div'); var newChildren = document.createDocumentFragment(); elements.forEach(element => newChildren.appendChild(element)); container.replaceChild(elements[changeIndex], container.children[changeIndex]);
replaceChildren
var changeIndex = 1; elements[changeIndex] = document.createElement('div'); var newChildren = document.createDocumentFragment(); elements.forEach(element => newChildren.appendChild(element)); container.replaceChildren(elements)
append documentFragment
var changeIndex = 1; elements[changeIndex] = document.createElement('div'); var newChildren = document.createDocumentFragment(); elements.forEach(element => newChildren.appendChild(element)); container.replaceChildren(newChildren)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
replaceChild
replaceChildren
append documentFragment

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 10 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36

Browser/OS: Chrome 121 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
replaceChild	0.0 Ops/sec
replaceChildren	955865.7 Ops/sec
append documentFragment	1179523.6 Ops/sec

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

LLMs can make mistakes. Check important info.

I'll break down the provided benchmarking test cases and explain what's being tested, compared, and their pros and cons.

**Benchmark Overview**

The test case measures the performance of three different approaches to replace or append child elements to an HTML container element in JavaScript:

1. `replaceChild`
2. `replaceChildren`
3. Using a `DocumentFragment`

**Script Preparation Code**

```javascript
var elements = [document.createElement('div'), document.createElement('div')];
var fragment = document.createDocumentFragment();
var container = document.getElementById('container');

elements.forEach(element => fragment.appendChild(element));
container.appendChild(fragment);
```

This code creates two new `div` elements, appends them to a `DocumentFragment`, and then appends the fragment to the target container element.

**Html Preparation Code**

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

A basic HTML container element is created with an ID of "container".

**Individual Test Cases**

Each test case measures the performance of one specific approach:

1. `replaceChild`
	* Benchmark Definition:
```javascript
var changeIndex = 1;
elements[changeIndex] = document.createElement('div');

var newChildren = document.createDocumentFragment();
elements.forEach(element => newChildren.appendChild(element));

container.replaceChild(elements[changeIndex], container.children[changeIndex]);
```

This approach uses `replaceChild` to replace the child element at the specified index with a new one.

2. `replaceChildren`
	* Benchmark Definition:
```javascript
var changeIndex = 1;
elements[changeIndex] = document.createElement('div');

var newChildren = document.createDocumentFragment();
elements.forEach(element => newChildren.appendChild(element));

container.replaceChildren(elements);
```

This approach uses `replaceChildren` to replace all child elements with a new one.

3. Using `DocumentFragment`
	* Benchmark Definition:
```javascript
var changeIndex = 1;
elements[changeIndex] = document.createElement('div');

var newChildren = document.createDocumentFragment();
elements.forEach(element => newChildren.appendChild(element));

container.replaceChildren(newChildren);
```

This approach uses a `DocumentFragment` to create a new container and replaces the original children with the fragment.

**Comparison**

The benchmark tests the performance of each approach, comparing their execution times. The results show that:

* Using a `DocumentFragment` (`append documentFragment`) is the fastest approach.
* `replaceChildren` has the next best performance.
* `replaceChild` has the slowest performance, likely due to its more complex implementation.

**Pros and Cons**

1. `replaceChild`
	* Pros: More flexible and efficient than `replaceChildren`, but can be slower for large datasets.
	* Cons: Requires careful handling of index values and can lead to bugs if not implemented correctly.
2. `replaceChildren`
	* Pros: Easier to use and more straightforward than `replaceChild`.
	* Cons: Can be slower than `replaceChild` and may not be suitable for all scenarios (e.g., when replacing individual elements).
3. Using a `DocumentFragment`
	* Pros: Fastest approach, easy to implement, and provides a convenient way to create a new container without affecting the original DOM.
	* Cons: May not be as flexible or efficient as other approaches for certain use cases.

**Other Considerations**

When deciding which approach to use, consider factors such as:

* Performance requirements
* Data size and complexity
* Flexibility and customizability needs

Keep in mind that these benchmarks are specific to the provided test case and may not be representative of all scenarios.

Related benchmarks:

replaceChild vs replaceChildren vs documentFragment 3 (version: 0)

Comparing performance of: replaceChild vs replaceChildren vs append documentFragment

Created: one year ago by: Guest

Jump to the latest result

replaceChild

replaceChildren

append documentFragment

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):