The Rust Book

 https://doc.rust-lang.org/book/ch00-00-introduction.html

There is another book called "Rust By Example" 

(both these books can be accessed by typing "rustup doc")

Systems Programming - Low-Level Academy

https://lowlvl.org

an explorable systems programming course that uses #rustlang and #webassembly for interactive playgrounds and visualisation. It starts with network programming, but it will be expanded to more topics! 

Rust related: Actix & Actix Web framework

OTP -> rust Actix, Phoenix -> actix-web, Ecto -> diesel

https://actix.rs/
https://github.com/actix/actix
https://github.com/actix/actix-web

Green Threads and Rust

https://cfsamson.gitbook.io/green-threads-explained-in-200-lines-of-rust/the-stack

Improving performance in Ruby/Rails code

http://blog.skylight.io/fixing-the-mysterious-slow-request/?utm_content=buffer21003&utm_medium=social&utm_source=twitter.com&utm_campaign=buffer

Talks mostly about object allocations and how we can improve (reduce) them;
Read through quickly once;
Has some links within it which seem interesting (but i haven't read yet);
Has good simple examples

Play with Rust

Play with Rust in the browser: https://play.rust-lang.org/

Jul 15 2015 - https://www.youtube.com/watch?v=Q7lQCgnNWU0