On Monday, August 25, 2003, at 10:08  AM, Frank van der Linden wrote:

> I wonder why the /dev/zero case is slower. I guess there's not much
> algorithmic improvement possible there; it's probably the worst case
> for the rbtree algorithm. But, it's also an uncommon case, so the
> regular file map speedup seems to clearly outweigh that one.

I guess the question is: does it hurt MAP_ANON performance the same way 
it hurts mmap of /dev/zero performance?

         -- Jason R. Thorpe <thorpej@wasabisystems.com>