I have compared the legendary FastAPI against Flask which is also legendary...but let's see further on.

Introduction to FastAPI and Django

FastAPI: A modern, high-performance framework designed for building APIs with Python 3.7+ that features automatic documentation, easy data validation, and modern Python type hints.

Django: A full-featured framework suitable for building complex web applications with built-in solutions for ORM, admin panels, and authentication.

Core Features and Advantages

FastAPI:

• High Performance: Comparable to Node.js and Go due to its asynchronous support.
• Rapid Development: Features like automatic documentation and editor support speed up the development process.
• Standards-Based: Fully compatible with OpenAPI and JSON Schema which streamlines API development.

Django:

• Rich Feature Set: Includes an ORM, admin panel, and extensive built-in functionalities.
• Highly Scalable: Ideal for complex applications like CMSs, e-commerce sites, and social networks.
• Strong Community: Benefits from a well-established community and comprehensive documentation.

Performance Comparison of FastAPI vs Django

FastAPI excels in scenarios requiring high performance, especially in environments that benefit from asynchronous programming.

Django offers reliable performance for a wide array of web applications, focusing on feature-rich solutions rather than sheer speed.

When to Use Each Framework

Use FastAPI if:

• You need stellar performance for APIs.
• Your project demands rapid development with modern Python features.
• You are building microservices or applications that require efficient real-time data processing.

Use Django if:

• You need a comprehensive solution with less dependency on external libraries.
• Your application requires a rich set of features out-of-the-box.
• You are developing complex systems like content management systems or e-commerce platforms that benefit from Django’s robust security and scalability.