Benchmark: ROUND1: React useCallback vs notUseCallback

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 ComponentWithOutUseCallback() {
  const testFunction = (evt) => evt.preventDefault()
  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');
}

Tests:

Without useCallback
ReactDOM.render(React.createElement(ComponentWithOutUseCallback), document.getElementById('root'))
With useCallback
ComponentWithUseCallback

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Without useCallback
With useCallback

Fastest: N/A

Slowest: N/A

Latest run results:

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

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**Overview of the Benchmark**

The provided JSON represents a JavaScript microbenchmarking test created on MeasureThat.net. The test compares the performance of two approaches in React: using `useCallback` and not using it.

**Options Compared**

Two options are compared:

1. **Without useCallback**: This option uses an explicit function declaration (`const testFunction = (evt) => evt.preventDefault()`) instead of using `useCallback`.
2. **With useCallback**: This option uses the `useCallback` hook to memoize the `testFunction`.

**Pros and Cons**

* **Without useCallback**:
	+ Pros: More control over the function definition, can be more readable for simple cases.
	+ Cons: Can lead to unnecessary re-renders if the dependency array is not properly managed.
* **With useCallback**:
	+ Pros: Memoizes the function, reducing unnecessary re-renders and improving performance. Also, it's a standard React pattern that encourages immutability and easier debugging.
	+ Cons: May add complexity for developers who are not familiar with it.

**Library Used**

The test uses React (version 16.13.1) and ReactDOM (version 16.13.1).

**Special JS Feature/Syntax**

None of the code snippets use any special JavaScript features or syntax beyond what's commonly used in React development.

**Other Considerations**

When using `useCallback`, it's essential to consider the dependency array, as it determines when the function should be re-memoized. An empty dependency array (`[]`) is used in this test, which means the function will only be re-memoized when the component is re-rendered.

**Other Alternatives**

If you want to explore alternative approaches or optimizations, consider the following:

* Use `useMemo` instead of `useCallback` for functions that don't depend on props or state.
* Consider using `React.memo` with a custom key function to memoize components without using `useCallback`.
* For more complex use cases, look into optimizing React's re-rendering process or exploring alternative rendering libraries like Preact.

Keep in mind that these alternatives might not be as widely adopted or well-tested as the approaches used in this benchmark.

Related benchmarks:

ROUND1: React useCallback vs notUseCallback (version: 0)

Comparing performance of: Without useCallback vs With useCallback

Created: 2 years ago by: Guest

Jump to the latest result

Without useCallback

With useCallback

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):