Benchmark: replaceWith vs replaceChild x100

HTML Preparation code:

<html>

  
  
</html>

Script Preparation code:

parentBox = document.createElement('div');
document.body.appendChild(parentBox);

Tests:

replaceWith
var Iframe1 = []; var Video1 = []; for (var i = 0; i < 100; i++) { Iframe1[i] = document.createElement('iframe'); parentBox.appendChild(Iframe1[i]); Video1[i] = document.createElement('video'); } for (var w = 9; w > -1; w--) { Iframe1[w].replaceWith(Video1[w]); }
replaceChild
var Iframe2 = []; var Video2 = []; for (var i = 0; i < 100; i++) { Iframe2[i] = document.createElement('iframe'); parentBox.appendChild(Iframe2[i]); Video2[i] = document.createElement('video'); } for (var c = 9; c > -1; c--) { parentBox.replaceChild(Video2[c], Iframe2[c]); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
replaceWith
replaceChild

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 5 days ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:151.0) Gecko/20100101 Firefox/151.0

Browser/OS: Firefox 151 on Mac OS X 10.15

View result in a separate tab

Test name	Executions per second
replaceWith	9.0 Ops/sec
replaceChild	8.7 Ops/sec

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

LLMs can make mistakes. Check important info.

**Overview**

The provided benchmark test measures the performance difference between two methods of replacing HTML elements: `replaceWith` and `replaceChild`. The test creates a series of 100 iframes and videos, appends them to a container element, and then replaces each iframe with a video using one of these two methods.

**Test Preparation Code**

The script preparation code creates a parent box element and appends it to the document body. This allows us to create and manipulate multiple elements without interfering with the rest of the page.

**HTML Preparation Code**

The HTML preparation code simply includes an empty HTML document, which will serve as the container for our test elements.

**Benchmark Definitions**

There are two benchmark definitions:

1. `replaceWith vs replaceChild x100`
This is a single benchmark definition that runs both the `replaceWith` and `replaceChild` tests.
2. Individual test cases
These are two separate test cases:
	* `replaceWith`: Replaces each iframe with a video using the `replaceWith` method.
	* `replaceChild`: Replaces each iframe with a video using the `replaceChild` method.

**Options Compared**

The `replaceWith` and `replaceChild` methods differ in their approach to replacing elements:

1. `replaceWith`:
	* Replaces the entire element tree, including all child elements.
	* Can be slower due to the overhead of recreating the element tree.
2. `replaceChild`:
	* Replaces only the specified element and its children, without affecting the rest of the tree.

**Pros and Cons**

**replaceWith**

Pros:

* Can be faster for simple replacements with minimal child elements.
* Simplifies code by removing the need to manually recreate the element tree.

Cons:

* Can be slower when dealing with complex element trees or many child elements.
* Requires more overhead due to the recreation of the entire element tree.

**replaceChild**

Pros:

* Faster than `replaceWith` for replacing large numbers of elements, especially those with minimal child elements.
* More efficient in terms of memory usage and processing power.

Cons:

* Can be slower when dealing with simple replacements or few child elements.
* Requires more code complexity due to the need to specify the element and its children to replace.

**Library and Special JS Features**

Neither of these methods rely on any specific libraries or special JavaScript features beyond standard DOM manipulation. The tests use only built-in browser functionality.

**Alternative Approaches**

Other approaches to replacing elements in HTML might include:

* Using a template engine like Handlebars or Mustache to render new templates.
* Utilizing a library like jQuery to simplify DOM manipulation and replacement.
* Leveraging modern web performance optimization techniques, such as requestAnimationFrame and Web Animations API.

Related benchmarks:

replaceWith vs replaceChild x100 (version: 0)

replace dom

Comparing performance of: replaceWith vs replaceChild

Created: 3 years ago by: Guest

Jump to the latest result

replaceWith

replaceChild

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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