kemal VS fastapi

Add your company to the list https://github.com/kemalcr/kemal/wiki/Companies-using-Kemal-in-Production

https://luckyframework.org/ . Kemal is even faster but it's mostly for APIs. In my opinion it's on par with Actix with much, much better developer experience.

It's been around for a while under development. It had it's 1.0.0 release in March 2021. There's been two (online) Crystal conferences, and there's two Crystal books published. There's a decent ecosystem of "shards" and there are a couple of Crystal web frameworks and ORMS that are similar to Sinatra or Rails-like. If you already know Ruby, learning Crystal is super easy.

They’re all good to try IMO, another is https://kemalcr.com which is akin to Sinatra if you just want to get an HTTP server with routes setup quickly.

Kemal (like Sinatra, I really like this one): https://kemalcr.com/

As an example, consider this small Kemal application:

That’s when I found FastAPI.

FastAPI & Uvicorn

Discussion at FastAPI GitHub: https://github.com/tiangolo/fastapi/issues/2696

An API application framework (such as FastAPI)

It’s been my experience that async Python frameworks tend to turn IO bound problems into CPU bound problems with a high enough request rate, because due to their nature they act as unbounded queues.

This ends up made worse if you’re using sync routes.

If you’re constrained on a resource such as a database connection pool, your framework will continue to pull http requests off the wire that a sane client will cancel and retry due to timeouts because it takes too long to get a connection out of the pool. Since there isn’t a straightforward way to cancel the execution of a route handler in every Python http framework I’ve seen exhibit this problem, the problem quickly snowballs.

This is an issue with fastapi, too- https://github.com/tiangolo/fastapi/issues/5759

Fast API.

We will create our API using FastAPI, a modern high-performance web framework for building fast APIs with Python. It is designed to be easy to use, efficient, and highly scalable. Some key features of FastAPI include:

FastAPI is a modern, fast, web framework for building APIs with Python 3.7+ based on standard Python type hints. It is designed to be easy to use, fast to run, and secure. In this blog post, we’ll explore the key features of FastAPI and walk through the process of creating a simple API using this powerful framework.

FastAPI is a modern, fast web framework for building APIs with Python 3.7+ that automatically generates OpenAPI and JSON Schema documentation. While FastAPI simplifies API development, manually creating and updating API documentation can still be a time-consuming task. In this blog post, we’ll explore how to leverage FastAPI’s automatic documentation generation capabilities, specifically focusing on Swagger and ReDoc, and how to streamline the process of documenting your APIs.