* C-extensions are loaded together with PHP one time on the web server’s daemon start process * Classes and functions provided by the extension are ready to use for any application * The code is compiled and isn’t interpreted because is already compiled to a specific platform and processor * Thanks to its low-level architecture and optimizations Phalcon provides the lowest overhead for MVC-based applications

* HTTP Router: Slim provides a fast and powerful router that maps route callbacks to specific HTTP request methods and URIs. It supports parameters and pattern matching. * Middleware: Build your application with concentric middleware to tweak the HTTP request and response objects around your Slim app. * PSR-7 Support: Slim supports any PSR-7 HTTP message implementation so you may inspect and manipulate HTTP message method, status, URI, headers, cookies, and body. * Dependency Injection: Slim supports dependency injection so you have complete control of your external tools. Use any Container-Interop container.