Benchmark: React useCallback hook vs. function (with state)

HTML Preparation code:

<!doctype html>
<html>
  <head>
    <title>This is the title of the webpage!</title>
  </head>
  <body>
  	<script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.13.1/umd/react.production.min.js"></script>
	<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.13.1/umd/react-dom.production.min.js"></script>
	<div id="root"></div> 
  </body>
</html>

Script Preparation code:

function ComponentWithUseCallback() {
    const [counter, setCounter] = React.useState(0);
    const testFunction = React.useCallback(evt => {
        setCounter(counter => counter + 1);
        evt.preventDefault();
    }, []);
    return React.createElement('button', {
        id: 'button',
        onClick: testFunction
    }, 'Test click');
}

function ComponentWithInlineFunction() {
    const [counter, setCounter] = React.useState(0);

    function testFunction(evt) {
        setCounter(counter => counter + 1);
        evt.preventDefault();
    }
    return React.createElement('button', {
        id: 'button',
        onClick: testFunction
    }, 'Test click');
}

function ComponentWithArrowFunction() {
    const [counter, setCounter] = React.useState(0);
    const testFunction = (evt) => {
        setCounter(counter => counter + 1);
        evt.preventDefault();
    }
    return React.createElement('button', {
        id: 'button',
        onClick: testFunction
    }, 'Test click');
}

Tests:

ComponentWithUseCallback
ReactDOM.render(React.createElement(ComponentWithUseCallback), document.getElementById('root')); document.getElementById('button')?.click(); document.getElementById('button')?.click(); document.getElementById('button')?.click();
ComponentWithInlineFunction
ReactDOM.render(React.createElement(ComponentWithInlineFunction), document.getElementById('root')); document.getElementById('button')?.click(); document.getElementById('button')?.click(); document.getElementById('button')?.click();
ComponentWithArrowFunction
ReactDOM.render(React.createElement(ComponentWithArrowFunction), document.getElementById('root')); document.getElementById('button')?.click(); document.getElementById('button')?.click(); document.getElementById('button')?.click();

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
ComponentWithUseCallback
ComponentWithInlineFunction
ComponentWithArrowFunction

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

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

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I'll break down the benchmark and explain what's being tested, along with the pros and cons of each approach.

**Benchmark Overview**

The benchmark compares three different ways to define a function in React: using an arrow function (`ComponentWithArrowFunction`), defining a named function (`ComponentWithInlineFunction`), and using the `React.useCallback` hook (`ComponentWithUseCallback`). The test measures how many times the button's click event is executed on each component.

**What's Being Tested**

The benchmark tests the performance difference between three approaches:

1. **Using an arrow function (`ComponentWithArrowFunction`)**: An arrow function is a concise way to define small, one-time-use functions.
2. **Defining a named function (`ComponentWithInlineFunction`)**: This approach defines a traditional JavaScript function using the `function` keyword.
3. **Using the `React.useCallback` hook (`ComponentWithUseCallback`)**: The `useCallback` hook is used to memoize (cache) functions, making them only re-run when their dependencies change.

**Pros and Cons of Each Approach**

1. **Arrow function (`ComponentWithArrowFunction`)**
	* Pros:
		+ Concise and readable
		+ Can be useful for small, one-time-use functions
	* Cons:
		+ May lead to performance issues if the function is complex or has many dependencies
2. **Defining a named function (`ComponentWithInlineFunction`)**
	* Pros:
		+ Easy to understand and debug
		+ Suitable for larger, more complex functions
	* Cons:
		+ Can result in slower execution due to the overhead of defining a new function on each render
3. **Using the `React.useCallback` hook (`ComponentWithUseCallback`)**
	* Pros:
		+ Memoization can improve performance by avoiding unnecessary re-renders
		+ Reduces memory allocation and deallocation overhead
	* Cons:
		+ Requires additional setup and understanding of React's lifecycle methods

**Library Usage**

In this benchmark, the `React` library is used extensively. Specifically:

1. **React.createElement**: used to create JSX elements.
2. **ReactDOM.render**: used to render the React component to the DOM.
3. **React.useCallback**: used to memoize the `testFunction` function.

**Special JS Features/Syntax**

None of the test cases use any special JavaScript features or syntax beyond what's standard in modern JavaScript.

**Alternatives**

Other approaches that could be tested in this benchmark include:

1. Using a higher-order component (HOC) instead of a standalone component.
2. Comparing the performance of different virtual DOM libraries, such as React or Preact.
3. Testing the impact of using server-side rendering (SSR) versus client-side rendering (CSR).
4. Evaluating the performance of different optimization techniques, such as code splitting or dead code elimination.

These alternatives would require modifications to the benchmark definition and test cases to accommodate the new approaches.

Related benchmarks:

React useCallback hook vs. function (with state) (version: 0)

Comparing performance of: ComponentWithUseCallback vs ComponentWithInlineFunction vs ComponentWithArrowFunction

Created: 2 years ago by: Guest

Jump to the latest result

ComponentWithUseCallback

ComponentWithInlineFunction

ComponentWithArrowFunction

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):