memcpy: The Safer Way to Reinterpret Data Types in C

Pointer casting for type punning violates C's strict aliasing rules and can trigger undefined behavior, while memcpy provides a standards-compliant method to safely reinterpret bit patterns between types. Modern compilers optimize memcpy recognition down to single register operations, eliminating function call overhead while maintaining code safety and portability. This technique is crucial for systems programming where low-level type conversion must be both reliable and efficient.