concurrency – WorthPosting

Go vs Rust vs Free-Threaded Python: Memory Models Compared

Every concurrent program rests on a promise most developers have never read: the language’s memory model. It is the contract

Python 3.13 gave us something Python developers had wanted for decades: a build of CPython with no Global Interpreter Lock.

Goroutines are famously cheap. You can scatter a hundred thousand of them across a program without thinking twice, and the

For most of Python’s history, the answer to “can I use threads for CPU-bound work?” was a firm no. The

Every high-concurrency network server on Linux eventually converges on the same bottleneck: not CPU, not memory, but the question of

What the borrow checker actually enforces, what Rust’s memory model promises, and which patterns — RefCell, Mutex, ownership restructuring — resolve the common contention points. … Continue readingThe Rust Borrow Checker Demystified: Aliasing, Memory Model, and When to Fight Back

Your CPU does not read single bytes. It moves memory between caches in fixed-size blocks called cache lines — 64

“It’s slow” is the least useful bug report in software. “It’s slow when 400 users hit the checkout endpoint simultaneously,