When comparing Tornado vs Falcon, the Slant community recommends Tornado for most people. In the question“What are the best general-purpose Python web frameworks usable in production sites?” Tornado is ranked 7th while Falcon is ranked 8th. The most important reason people chose Tornado is:
Tornado can scale to several open connections at the same time. This makes it perfect for applications where performance is very important.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Designed for performance
Tornado can scale to several open connections at the same time. This makes it perfect for applications where performance is very important.
Pro Amazing asynchronous functionalities
Pro Built to build REST APIs
Falcon is designed entirely around building REST APIs. It achieves this helps a lot with it being lightweight and simple. It also helps developers take some design choices which would otherwise not be possible with a more general-purpose framework,
Pro Lightweight with minimal dependencies
Falcon is a very lightweight framework. This can be noticed simply by looking at the dependency list: other than the python standard library, six and mimeparse are the only dependencies.
Pro Performance is really awesome
Cons
Con It's usually useful only when building real-time web applications
Because it's basically a framework for building real-time applications it has great support for things like WebScokets and uses non-blocking I/O. But it lacks in features that are used to build general-purpose websites like blogs, e-commerce sites, web portals etc...
For example it lacks ORM integration (at least out of the box) and it doesn't have a very powerful template engine.
Con Limited in scope
Being designed around building REST APIs and the fact that it's minimalistic with very few dependencies makes Falcon opinionated (you should build a REST API) and limited in scope (you shouldn't be using Falcon to build a news site, blog or ecommerce platform).