What are the performance implications of the Observer Pattern?

What are the performance implications of the Observer Pattern?

The Observer Pattern can lead to performance issues if there are too many observers, as each change in the subject requires notifying all observers.

How does the number of observers affect performance?

As the number of observers increases, the time taken to notify each observer grows, which can slow down the system, especially if updates are frequent.

Are there any strategies to mitigate these performance issues?

Yes, strategies include limiting the number of observers, batching notifications, or using a more efficient data structure for managing observers.

Can you give an example of a scenario where this pattern might be problematic?

Certainly! In a real-time stock market application, if every stock price change notifies thousands of observers, it can lead to significant lag.