Justus Winter, le Fri 28 Mar 2014 16:22:14 +0100, a écrit : > Steal all string functions previously implemented in kern/strings.c > from the libc. Those are most likely more optimized than our simple > implementations.
Well, we used to do that in the past, actually, and ended up into various kinds of issues. For instance, one can't really use SSE inside the kernel, and the likes. Such kinds of very simple operations already get optimized easily by the compiler or even the processor itself (see a disassemble of memcpy, it ends up being a rep movsb %ds:(%esi),%es:(%edi), which is just exactly what we need to tell the processor). I don't think the maintenance burden is worth the performance gain. Samuel
