Using a production-grade app server

As we have mentioned before, the built-in server that comes with Flask is not optimized for performance and is intended primarily for development purposes. While it appears to perform adequately in our asynchronous experiment, when transitioning an application to a production environment, it’s strongly recommended to use a production-grade Web Server Gateway Interface (WSGI) server. WSGI is a specification in Python that provides a universal interface between web servers and web applications or frameworks. Several robust options are available, including Gunicorn, uWSGI, and Apache with mod_wsgi. These servers are designed to meet the demands of a production environment, offering enhanced performance, security, stability, and scalability. As we will demonstrate next, migrating to one of these servers is a relatively easy task.

Using the Gunicorn server

The first server option we will explore is Gunicorn, short for Green unicorn. It is...