Benchmark: React 17 useCallback

HTML Preparation code:

<html>
  <body>
    <div id="root"></div>
    <script crossorigin src="https://unpkg.com/react@18/umd/react.development.js"></script>
    <script crossorigin src="https://unpkg.com/react-dom@18/umd/react-dom.development.js"></script>
  </body>
</html

Script Preparation code:

function ComponentWithUseCallback() {
 	const handleClick = React.useCallback((event) => event.preventDefault());
  	return React.createElement('button', { onClick: handleClick }, 'btn');
}

function Component() {
 	const handleClick = (event) => event.preventDefault();
  	return React.createElement('button', { onClick: handleClick }, 'btn');
}

Tests:

ComponentWithUseCallback
ReactDOM.render(ComponentWithUseCallback, document.getElementById('root'));
Component
ReactDOM.render(Component, document.getElementById('root'));

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
ComponentWithUseCallback
Component

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:138.0) Gecko/20100101 Firefox/138.0

Browser/OS: Firefox 138 on Linux

View result in a separate tab

Test name	Executions per second
ComponentWithUseCallback	29358.9 Ops/sec
Component	28167.2 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks on MeasureThat.net.

**Benchmark Overview**

The provided benchmark measures the performance difference between two React components: `ComponentWithUseCallback` and `Component`. Both components render a simple button that prevents default form submission when clicked.

**Options Compared**

The benchmark compares two approaches:

1. **React 17's `useCallback`**: This hook memoizes the `handleClick` function, which is only recreated when the component mounts or updates.
2. **Plain JavaScript function**: The `handleClick` function is defined as a plain JavaScript function that takes an event object as an argument.

**Pros and Cons of Each Approach**

1. **React 17's `useCallback`**:
	* Pros: Reduces unnecessary re-renders of the component, improves performance.
	* Cons: Introduces additional complexity due to the use of memoization, may not be suitable for all scenarios where function updates are not expected.
2. **Plain JavaScript function**:
	* Pros: Simple and lightweight, no dependencies on React or its APIs.
	* Cons: May lead to unnecessary re-renders of the component if the `handleClick` function is updated more frequently than necessary.

**Library Used**

The benchmark uses the following libraries:

1. **React**: A JavaScript library for building user interfaces.
2. **ReactDOM**: A companion library for React that provides DOM-related functionality.
3. **Chrome**: The browser used to execute the benchmark.

**Special JS Feature or Syntax (None)**

There are no special JavaScript features or syntax used in this benchmark.

**Other Considerations**

When choosing between these two approaches, consider the following factors:

1. **Component lifecycle**: If the component is likely to be re-rendered frequently, using `useCallback` might help reduce unnecessary re-renders.
2. **Function update frequency**: If the `handleClick` function needs to be updated often, a plain JavaScript function might be more suitable.

**Alternative Approaches**

Other approaches you could explore for similar use cases include:

1. **Using a closure**: Instead of using `useCallback`, you could define `handleClick` as a closure that takes an event object as an argument.
2. **Using a caching library**: If the component needs to cache frequently updated values, consider using a caching library like LRU Cache or Redis.
3. **Optimizing React components**: Explore other React optimization techniques, such as using `shouldComponentUpdate` or optimizing render logic.

Keep in mind that the best approach will depend on your specific use case and requirements.

Related benchmarks:

React 17 useCallback (version: 0)

Comparing performance of: ComponentWithUseCallback vs Component

Created: 3 years ago by: Guest

Jump to the latest result

ComponentWithUseCallback

Component

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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