Why Python Caches Small Integers and How the Internal Object Pools Work

This article explains Python's integer object implementation, detailing how small integers are cached in a fixed‑size pool, how larger integers are managed through a dynamic PyIntBlock structure, and why using xrange (or range in Python 3) avoids memory bloat.

CPythonMemory Managementinteger object

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Why Python Caches Small Integers and How the Internal Object Pools Work