Independent field notes / Vol. 01

Python,
below the surface.

Precise explanations of the machinery, patterns, and tradeoffs that make Python feel deceptively simple.

The index

Choose a rabbit hole.

7 notes, edited for signal.

Remove repeated work with better structures, indexes, sorting strategies, batching, and precomputation.

intermediate32 minPython 3.10+

Measure temporary objects, retained memory, and data layout before trading clarity for reuse.

advanced31 minPython 3.10+

Design repeatable timing experiments that measure the workload you actually care about.

intermediate28 minPython 3.10+

Move useful work across Python, native, I/O, and process boundaries without optimizing the wrong crossing.

advanced33 minPython 3.10+

Separate Python call semantics from CPython vectorcall, then design APIs that avoid needless argument and boundary overhead.

advanced31 minPython 3.14

Use cProfile and pstats to locate expensive call paths before choosing what to optimize.

intermediate30 minPython 3.10+

Inspect how CPython 3.14 adapts hot bytecode to stable runtime types, and where it cannot help.

advanced30 minPython 3.14

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.