Re: [Valgrind-users] Expected slowdown

[Julian S. <js...@ac...>]

> Old valgrind: 144765 seconds
> New valgrind:  17232 seconds
> Without valgrind: 251 seconds
>
> Although this is nearly ten times faster than the old version it is still
> quite slow for me with a slowdown factor of 68x. But I guess that memcheck
> cannot run faster.

68:1 is right on the outer limits of what we expect.  It would be
typical of a program that did malloc/free continuously, but no
useful work (eg perf/heap.c).  More typically on amd64 we would expect 
20-30x slowdown.

So, send OProfile data for a run of the new valgrind and let's see
if there is any other obvious bad thing visible.

J