[mythtv] [feature] Fast MemCopy

[Kenneth Aafløy]

Hi!

Okay, so mplayer, xine and a patch for the via driver in xfree has a
routine to bench different versions of memcpy on runtime
(glibc,mmx,sse...). Now these optimized versions (I think) is only a
speedup with length over ~250 bytes, and what I'm wondering about here
then, is this needed and would it benefit MythTV some? If someone could
comment on a couple of major copys in the main player codepath, I'll
take it upon me to do the dirtywork!

Kenneth