Writing string.h functions using string instructions in asm x86-64
This technical article explores low-level assembly implementation of standard C string functions (memcpy, memcmp, etc.) using x86-64 string instructions and SIMD. While highly detailed for systems programmers, this represents legacy optimization techniques that modern compilers already handle automatically through built-in functions. For IT organizations, this type of manual optimization is rarely necessary or cost-effective, as compiler technologies and standard libraries provide well-optimized implementations that balance performance across diverse hardware platforms.
Hacker News3 min read
This technical article explores low-level assembly implementation of standard C string functions (memcpy, memcmp, etc.) using x86-64 string instructions and SIMD. While highly detailed for systems programmers, this represents legacy optimization techniques that modern compilers already handle automatically through built-in functions. For IT organizations, this type of manual optimization is rarely necessary or cost-effective, as compiler technologies and standard libraries provide well-optimized implementations that balance performance across diverse hardware platforms.