Efficient Ops
Dec 27, 2018 · Fundamentals
Why Python Lists Aren’t Pre‑Allocated: Inside CPython’s Memory Management
Python’s list type appears flexible, but its underlying CPython implementation uses a dynamic resizing strategy without a pre‑allocated memory pool, allocating memory on demand via list_resize and PyMem_RESIZE, which this article explains through code analysis, memory size measurements, and practical recommendations.
CPythonListMemory Management
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