Python Threads vs Processes Explained: The Core Silicon Boundary

Python concurrency feels approachable until your app freezes, leaks memory, or runs slower than a sequential script. This first part of a deep-dive series builds a systems-level foundation, explaining how the OS creates processes and threads, why they behave differently with shared memory, and proving it all with runnable code. A strong starting point before tackling asyncio, multiprocessing, and FastAPI under real traffic.