sudden questions

2025.12.8

Why C++ is faster than Python in many ways?

1. Compiled vs. Interpreted
   C++: Compiler translate code into machine code directly.

   • When Running: CPU excecute instractions directly.

   Python: code -> Bytecode -> PVM (read line by line and excecute)

   • When Running: CPU runs VM, VM runs Python code.

2. Static vs. Dynamic Typing

3. Memory & Object Overhead

   a int variable: in C++ 4 Bytes, in Python is a PyObject struct and takes > 28 Bytes.

4. C++ has Compiler Optimization

Python library’s underlying core code is C++/C !