Benchmark: innerhtml vs removechild

HTML Preparation code:

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

Script Preparation code:

var node = document.getElementById('container');

for(var i = 0; i < 100; i++) node.appendChild(document.createElement('div'));

Tests:

innerHTML
var node = document.getElementById('container'); node.innerHTML = '';
removeChild
var node = document.getElementById('container'); var child; while(child=node.firstChild) node.removeChild(child)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
innerHTML
removeChild

Fastest: N/A

Slowest: N/A

Latest run results:

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

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Let's break down the provided JSON data and explain what is being tested, compared, and the pros/cons of each approach.

**Benchmark Overview**

The benchmark compares two approaches to clear an HTML node:

1. `innerHTML`: setting the innerHTML property directly on the element.
2. `removeChild`: repeatedly removing child nodes using `removeChild()` method.

**Script Preparation Code**

The script preparation code creates a container HTML element and appends 100 child elements to it:
```javascript
var node = document.getElementById('container');
for (var i = 0; i < 100; i++) {
  node.appendChild(document.createElement('div'));
}
```
This code sets up the test scenario by creating a large number of child elements, which will be used to measure the performance of each approach.

**Html Preparation Code**

The HTML preparation code defines an empty container element with an ID of "container":
```html
<div id="container"></div>
```
This code provides the context for the script preparation code and allows the test to run on a real DOM node.

**Individual Test Cases**

There are two individual test cases:

1. `innerHTML`:
```javascript
var node = document.getElementById('container');
node.innerHTML = '';
```
This test case measures the performance of setting the innerHTML property directly on the element.

2. `removeChild`:
```javascript
var node = document.getElementById('container');
var child;
while (child = node.firstChild) {
  node.removeChild(child);
}
```
This test case repeatedly removes child nodes using a while loop and the `removeChild()` method.

**Library Used**

There is no explicit library mentioned in the JSON data. However, both tests use the `document` object, which is part of the DOM (Document Object Model) API provided by web browsers.

**Special JS Features or Syntax**

Neither test case uses any special JavaScript features or syntax. The tests are designed to be simple and straightforward, focusing on the performance differences between two approaches.

**Pros and Cons of Each Approach**

1. `innerHTML`:
	* Pros:
		+ Simple and concise
		+ Fast, as it only involves setting a single property
	* Cons:
		+ Can lead to unnecessary DOM mutations if not used carefully
		+ May trigger browser optimizations or reflows due to DOM changes
2. `removeChild`:
	* Pros:
		+ More control over the removal process (e.g., iterating through child nodes)
		+ Can be useful for more complex scenarios where innerHTML is not sufficient
	* Cons:
		+ Slower, as it involves repeated DOM mutations and node removals

**Other Alternatives**

If you need to clear an HTML node, other alternatives might include:

1. `innerText` property (not supported in older browsers)
2. Using a library like jQuery's `.empty()` method
3. Creating a new element with the same content using `document.createElement('div')`.clear()`

Keep in mind that these alternatives may have different performance characteristics and use cases, so it's essential to test and evaluate them based on your specific requirements.

In summary, this benchmark compares two simple approaches to clearing an HTML node, highlighting the trade-offs between setting innerHTML and removing child nodes using `removeChild()` method.

Related benchmarks:

innerhtml vs removechild (version: 0)

Comparing performance of: innerHTML vs removeChild

Created: 8 years ago by: Guest

Jump to the latest result

innerHTML

removeChild

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

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