An Actor based application may need to send several messages to an Actor instance. For example, an e-commerce application may require an Actor instance to update the user shopping cart. The Actor instance might be busy completing the process of adding a previous item to the cart. Since, the Actor operations are single threaded, the application will need to wait for the Actor to finish its previous operation to proceed with the next one.

The wait to complete operations degrades performance of application and affects user experience: