Also note that only the most basic library functions are likely to be optimized specifically for your platform (e.g. assembly). Mostly basic memory stuff like m

Also note that only the most basic library functions are likely to be optimized specifically for your platform (e.g. assembly). Mostly basic memory stuff like memcpy, strcpy, memcmp, strcmp, strchr,... Anything more complex can be usually be made very fast with just pure C code, comparable to implementations that come with your compiler.