Benchmark: React useCallback hook vs. function in 18 react

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/18.1.0/umd/react.production.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/18.1.0/umd/react-dom.production.min.js"></script>
    <div id="root"></div>
</body>

</html>

Script Preparation code:

function ComponentWithOuterFunctionUseCallback() {
  function functionToTest(evt) {
	evt.preventDefault();
  }
  const testFunction = React.useCallback(functionToTest, []);
  return React.createElement('button', {onClick: testFunction}, 'Test click');
}

function ComponentWithUseCallback() {
  const testFunction = React.useCallback(evt => evt.preventDefault(), []);
  return React.createElement('button', {onClick: testFunction}, 'Test click');
}

function ComponentWithInlineFunction() {
  function testFunction(evt) {
    evt.preventDefault();
  }
  return React.createElement('button', {onClick: testFunction}, 'Test click');
}

function ComponentWithArrowFunction() {
  const testFunction = (evt) => {
    evt.preventDefault();
  }
  return React.createElement('button', {onClick: testFunction}, 'Test click');
}

Tests:

ComponentWithOuterFunctionUseCallback
ReactDOM.render(React.createElement(ComponentWithOuterFunctionUseCallback), document.getElementById('root'))
ComponentWithUseCallback
ReactDOM.render(React.createElement(ComponentWithUseCallback), document.getElementById('root'))
ComponentWithInlineFunction
ReactDOM.render(React.createElement(ComponentWithInlineFunction), document.getElementById('root'))
ComponentWithArrowFunction
ReactDOM.render(React.createElement(ComponentWithArrowFunction), document.getElementById('root'))

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
ComponentWithOuterFunctionUseCallback
ComponentWithUseCallback
ComponentWithInlineFunction
ComponentWithArrowFunction

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.5 Mobile/22F76 Safari/604.1

Browser/OS: Mobile Safari 18 on iOS 18.5

View result in a separate tab

ComponentWithOuterFunctionUseCallback

2.5M/s

ComponentWithUseCallback

2.3M/s

ComponentWithInlineFunction

717K/s

ComponentWithArrowFunction

378K/s

View exact numbers

Test name	Executions per second
✓ ComponentWithOuterFunctionUseCallback	2,468,747 Ops/sec
ComponentWithUseCallback	2,310,158 Ops/sec
ComponentWithInlineFunction	717,229 Ops/sec
ComponentWithArrowFunction	377,858 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!

**Benchmark Overview**

The provided JSON represents a benchmarking test created using MeasureThat.net, which compares the performance of different approaches to implement a callback function in React. The benchmark tests four variants:

1. `ComponentWithOuterFunctionUseCallback`
2. `ComponentWithUseCallback`
3. `ComponentWithInlineFunction`
4. `ComponentWithArrowFunction`

**Options Compared**

The benchmark compares the performance of these four options, which differ in how they implement a callback function:

* **Option 1: `ComponentWithOuterFunctionUseCallback`**: This approach uses the `React.useCallback` hook to memoize the `testFunction`, wrapping it in an outer function. The `useCallback` hook takes two arguments: the function to be memoized and its dependencies (in this case, an empty array). This ensures that the `testFunction` is only recreated when the dependencies change.
* **Option 2: `ComponentWithUseCallback`**: This approach uses the same `React.useCallback` hook as above but with a slightly different syntax. The function to be memoized is defined inside the `useCallback` hook, without the outer wrapping function.
* **Option 3: `ComponentWithInlineFunction`**: This approach defines the `testFunction` directly within the component's render method, without using any hooks or memoization.
* **Option 4: `ComponentWithArrowFunction`**: This approach uses an arrow function to define the `testFunction`, which is then passed to the `useCallback` hook.

**Pros and Cons of Each Approach**

Here are some general pros and cons for each approach:

* **React.useCallback (Options 1 and 2)**:
	+ Pros: Efficient memoization, reduces unnecessary re-renders.
	+ Cons: Requires understanding of React's lifecycle and hooks.
* **Inline Functions (Option 3)**:
	+ Pros: Simple and straightforward implementation.
	+ Cons: Potential performance issues due to unnecessary re-renders.
* **Arrow Functions (Option 4)**:
	+ Pros: Similar benefits to `useCallback` with a more concise syntax.
	+ Cons: May require additional understanding of JavaScript arrow functions.

**Other Considerations**

When evaluating these options, consider the following factors:

* Code maintainability and readability
* Performance implications for specific use cases (e.g., server-side rendering, complex computations)
* Compatibility with different browsers and environments

**Library Used**

In this benchmark, `React` is used as a library. React is a JavaScript library for building user interfaces, and it provides several hooks, including `useCallback`, to help manage component state and side effects.

**Special JS Features or Syntax**

None of the tested options rely on special JavaScript features or syntax beyond what's standard in modern JavaScript (ES6+). However, keep in mind that React-specific features like hooks can introduce new complexities and nuances for some developers.

Now that we've explored the benchmark, let's take a look at other alternatives:

* **Alternative approaches**: Other ways to implement callbacks in React might include using event handlers or custom event listeners.
* **Testing frameworks**: MeasureThat.net is a specialized testing framework for JavaScript microbenchmarks. Other options like Jest or Mocha can be used for more general-purpose testing.

Feel free to ask if you have any further questions about this benchmark or the related concepts!

React useCallback hook vs. function in 18 react (version: 0)

Comparing performance of: `ComponentWithOuterFunctionUseCallback vs ComponentWithUseCallback vs ComponentWithInlineFunction vs ComponentWithArrowFunction`

Created: 4 years ago by: Guest

Go to the latest result

ComponentWithOuterFunctionUseCallback

ComponentWithUseCallback

ComponentWithInlineFunction

ComponentWithArrowFunction

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

React useCallback hook vs. function in 18 react (version: 0)

Comparing performance of: ComponentWithOuterFunctionUseCallback vs ComponentWithUseCallback vs ComponentWithInlineFunction vs ComponentWithArrowFunction

Created: 4 years ago by: Guest

Go to the latest result

ComponentWithOuterFunctionUseCallback

ComponentWithUseCallback

ComponentWithInlineFunction

ComponentWithArrowFunction

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

Related benchmarks

Comparing performance of: `ComponentWithOuterFunctionUseCallback vs ComponentWithUseCallback vs ComponentWithInlineFunction vs ComponentWithArrowFunction`