C strcpy() - evil?

Question

Some people seem to think that C\'s strcpy() function is bad or evil. While I admit that it\'s usually better to use strncpy() in order to avoid bu

Answer 1

memcpy can be faster than strcpy and strncpy because it does not have to compare each copied byte with '\0', and because it already knows the length of the copied object. It can be implemented in a similar way with the Duff's device, or use assembler instructions that copy several bytes at a time, like movsw and movsd