Threads in Rust

1. Threads in Rust
2. First example with threads
3. Threads with messages
4. Two threads sending messages
5. Testing speed improvements with threads
6. Save many files
7. Rust threads read-only access to shared variables
8. Pass reference of read-only vector to thread
9. Pass reference of read-only vector to thread improved
10. Pass and return reference (return ownership)
11. Thread scope
12. chdir in threads
13. map with threads
14. map with threads with Mutex
15. Counter in a loop in the same process and thread
16. Counter with threads (shared variable?)
17. Counter with message passing