01
Inside CPython's allocator
Connect Python allocations to pymalloc arenas, pools, blocks, process RSS, tracemalloc domains, and responsible measurement.
Independent field notes / Vol. 01
Python,
below the surface.
Precise explanations of the machinery, patterns, and tradeoffs that make Python feel deceptively simple.
Read the cover storyThe index
Choose a rabbit hole.
5 notes, edited for signal.
02
Finalization is where simple models fail
Design reliable cleanup around context managers, finalizers, cycles, resurrection, shutdown, async cancellation, and process exit.
03
Reference counting and cyclic garbage collection
Build a precise model of CPython object lifetime, cycles, finalizers, weak references, and the diagnostics that can accidentally keep objects alive.
04
Names are references, but that slogan is not enough
Build a precise model of binding, mutation, copying, argument passing, closure cells, identity, and API ownership.
05
Weak references and caches that can let go
Use weak references, weak containers, and finalizers without confusing reachability, equality, callbacks, or cache policy.
Editorial policy
No listicles. No folklore. No just trust me abstractions.
Every note should leave you with a better model of the system, not just another snippet to paste.