Python Internals: Memory Management, Built-in Features, and Coding Standards
Memory Optimization Strategies
CPython employs several internal strategies to minimize allocation overhead for common immutable values.
Small Integer Caching
The interpreter pre-allocates integers from -5 through 256. Any assignment within this band references a single shared object rather than requesting new memory.
m = 42
n = 42
assert m is n ...
Posted on Tue, 13 Oct 2026 16:23:49 +0000 by bPHP