Benchmark: createElement vs Class new

Script Preparation code:

var A = class{
  constructor(){}
	setup(){
    	this.name = "a"
    }
}

Tests:

createElement
document.createElement('div')
class new
new A()

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
createElement
class new

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one month ago)

User agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:109.0) Gecko/20100101 Firefox/115.0

Browser/OS: Firefox 115 on Windows 7

View result in a separate tab

Test name	Executions per second
createElement	1319016.5 Ops/sec
class new	568246912.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what's being tested.

**Benchmark Overview**

The benchmark compares two approaches to create an instance of an object: using the `document.createElement()` method and creating a class constructor with the `class` keyword (also known as "class syntax").

**What is Being Tested?**

In this benchmark, we're measuring the performance difference between:

1. **createElement**: Creating a new element using `document.createElement('div')`.
2. **Class New**: Creating an instance of a class using the `new` keyword followed by the class constructor.

**Options Compared**

The two options being compared are:

* **createElement**: This method creates a new DOM element and returns it as a new HTML element object.
* **Class New**: This approach defines a class with a constructor function, which is then instantiated using the `new` keyword.

**Pros and Cons of Each Approach:**

1. **createElement**:
	* Pros:
		+ Lightweight and easy to use.
		+ Creates a new DOM element that can be used for rendering or manipulating the document tree.
	* Cons:
		+ May have overhead due to the creation of a new DOM node.
2. **Class New**:
	* Pros:
		+ Provides more control over object creation and initialization.
		+ Can lead to better encapsulation and modularity in larger applications.
	* Cons:
		+ Requires defining a class and constructor function, which can add complexity.

**Other Considerations**

* **Library Usage**: The benchmark uses the `class` keyword, which is a JavaScript feature introduced in ECMAScript 2015 (ES6). This feature allows for more concise and expressive way of defining classes.
* **JS Features**: There are no other special JS features or syntax being used in this benchmark.

**Alternatives**

If you're looking to create an instance of an object without using the `new` keyword, you can also use:

* **Constructor Functions**: An older approach to creating objects without classes. Instead of using `class`, you define a constructor function with the same name as the class.
* **Prototype-based Object Creation**: This approach creates objects by setting properties on a prototype object.

Keep in mind that these alternatives may have different performance characteristics and use cases compared to the `new` keyword or the `document.createElement()` method.

Related benchmarks:

createElement vs Class new (version: 0)

Comparing performance of: createElement vs class new

Created: 2 years ago by: Guest

Jump to the latest result

createElement

class new

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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