Making A Mutex from Scratch in Rust to Understand Thread Safety

Hey r/programming! I wrote a comprehensive article on constructing a mutex from scratch. It covers: - Data races: what happens at the register level, and how parallel access can go wrong - Atomics & Memory Ordering: why atomics work and what each memory ordering does (Aq/Rel/AqRel/SeqCst) - Spin lock & Guards: Building a simple mutual exclusion lock via an AtomicBool, and providing safe access to the protected data - And finally, Mutexes: A more complex mutual exclusion primitive that can achieve better performance via thread::park/::unpark The article benchmarks and compares the performance of both a spinlock and Mutex to understand when to use which. Have you ever noticed a massive performance boost from switching from one synchronization primitive to another? Feedback on the article is also appreciated!