FastAPI vs Flask

FastAPI is a Python framework and set of tools that enables developers to use a REST interface to call commonly used functions to implement applications . It is accessed through a REST API to call common building blocks for an app. In this example, the author uses FastAPI to create accounts, login, and authenticate.

FastAPI is a Python framework and set of tools that enables developers to use a REST interface to call commonly used functions to implement applications . It is accessed through a REST API to call common building blocks for an app. In this example, the author uses FastAPI to create accounts, login, and authenticate.

Express (NodeJS) is ~1.5x faster than FastAPI (Python) and, these frameworks are ~7.5 and ~11.35 times slower than Fiber (as per multi-core async performance).

Express (NodeJS) is ~1.5x faster than FastAPI (Python) and, these frameworks are ~7.5 and ~11.35 times slower than Fiber (as per multi-core async performance).

Flask is more battle-tested, therefore slightly more reliable , and it’s widely used. FastAPI is a newer, more modern framework known for its speed with lots of built-in support like Pydantic and SwaggerUI. Now that you have a better understanding of each framework, let our faceoff begin!