Automatic batching

Automatic batching is a new feature in React 18 that improves the performance of updates by automatically batching multiple updates into a single render pass. In traditional React, updates to the user interface are typically processed synchronously, which means that each update triggers a new render pass.

This can be inefficient, especially when multiple updates occur in rapid succession. Automatic batching solves this problem by grouping multiple updates together and processing them in a single render pass.

Here’s an example to illustrate how automatic batching works:

function MyComponent() {
  const [count, setCount] = useState(0)
  function handleClick() {
    setCount(count + 1)
    setCount(count + 1)
    setCount(count + 1)
  }
  return (
    <div>
      <p>Count: {count}</p>
      <button onClick={handleClick}>Increment</button>
    </div>
  )
}

In this example, we have a MyComponent component that...