The Basilisk Journal

Concurrency

Writing collected under this topic.

Parallel Python execution threads running side by side over a strict type-checking safety layer

Deep dives July 11, 2026

Free-Threaded Python: Why Type Checking Matters More Now

Python 3.14 made free-threaded Python officially supported. When threads really run in parallel, a type error stops being a quiet annoyance and becomes a concurrency bug. Here's why strict, default-on type checking is the cheapest protection you can buy.