Rust web frameworks comparison

I'm doing some experiments with Rust because it is a language that promises to be as fast as C/C++, but safer in regards to memory management. Essentially, it doesn't allow the developer to do "bad things" with the memory like: forgetting release the memory that is not going to be used anymore or release memory if the developer is not the owner. In such scenarios, Rust won't compile.

Just for learning I've started a small project that offers a REST API, so I've started looking for frameworks to ease/speed up the development. I've found a Rust web frameworks comparison: