Benchmark: React Const vs Function 2

HTML Preparation code:

<script crossorigin src="https://unpkg.com/react@16/umd/react.production.min.js"></script>
<script crossorigin src="https://unpkg.com/react-dom@16/umd/react-dom.production.min.js"></script>
<div id="dest"></div>

Tests:

const
const Hello = ({toWhat}) => React.createElement('div', null, `Hello ${toWhat}`); ReactDOM.render( React.createElement(Hello, {toWhat: 'World'}, null), document.getElementById('dest') );
function
function Hello({toWhat}) { return React.createElement('div', null, `Hello ${toWhat}`); }; ReactDOM.render( React.createElement(Hello, {toWhat: 'Worldd'}, null), document.getElementById('dest') );

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
const
function

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:102.0) Gecko/20100101 Firefox/102.0

Browser/OS: Firefox 102 on Windows

View result in a separate tab

Test name	Executions per second
const	100811.1 Ops/sec
function	66922.8 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the explanation of the provided benchmark.

**What is being tested?**

The test measures the performance difference between two approaches to defining React components: using `const` and using functions (also known as arrow functions).

**Options compared:**

Two options are being compared:

1. **Using `const`**: This approach defines a named function component, where the `Hello` function is declared with the `const` keyword.
2. **Using functions (arrow functions)**: This approach defines an anonymous function component, where the `Hello` function is defined as an arrow function.

**Pros and Cons of each approach:**

* **Using `const`:**
	+ Pros:
		- Can be beneficial for performance since the function is declared with a constant keyword, which can lead to better caching.
		- Easier to read and understand, especially for beginners.
	+ Cons:
		- Less flexible than functions (arrow functions) since it limits reusability.
* **Using functions (arrow functions):**
	+ Pros:
		- More flexible and reusable compared to named function components.
		- Can be beneficial for performance since arrow functions are essentially a shorthand syntax for anonymous functions.
	+ Cons:
		- May have slightly higher overhead due to the need to define an explicit function signature.

**Other considerations:**

The test does not consider other factors that might affect performance, such as:

* Component lifecycle methods (e.g., `componentDidMount`, `componentWillUnmount`)
* Complex component logic
* State management and updates

**Library usage:**

Both tests use the React library to render components. Specifically, they utilize the following libraries:

* React: a JavaScript library for building user interfaces.
* ReactDOM: a library that makes it easy to render React components in the browser.

**Special JS features or syntax:**

The test uses several special features or syntax:

* **Arrow functions**: The `Hello` function is defined as an arrow function (`({toWhat}) => ...`). This is a shorthand syntax for defining anonymous functions.
* **Template literals**: The string interpolation (`"Hello ${toWhat}"`) uses template literals, which allow you to embed expressions inside strings.

**Alternatives:**

To measure the performance difference between using `const` and functions (arrow functions), alternative approaches could include:

* Using classes instead of function components
* Using dynamic component creation (e.g., with a library like React.createElement)
* Using server-side rendering or other optimization techniques

These alternatives would require modifications to the benchmark definition and test cases, but they could provide more comprehensive insights into performance differences between various React component approaches.

Related benchmarks:

React Const vs Function 2 (version: 0)

Comparing performance of: const vs function

Created: one year ago by: Guest

Jump to the latest result

const

function

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):