Traditionally in PHP, each HTTP request is processed by a new instance of an application. This "shared nothing" architecture provides crucial simplicity, security and stability.

However, we can keep Symfony applications alive between requests and vastly improve their performance.

Wait a minute before charging off! When using PHP in this way we have to pay careful attention to session handling, application state and memory leaks. This talk will demonstrate how to develop and configure Symfony applications for this purpose.