What are the advantages of using the const keyword when defining widgets?

Using the const keyword when defining widgets in Flutter offers several important advantages:

• Performance Optimization: const widgets are created once during compilation and are not recreated during rebuilds, reducing garbage collection load and speeding up the app.
• Reference Comparison: const widgets are compared by reference, not by value, simplifying and speeding up change detection in the widget tree.
• Immutability Safety: const guarantees that the widget and all its fields are immutable, preventing accidental state changes.

Example:

const Text('Hello, world!')

Here, Text will be created once and reused unless the widget changes.