Path ping...

[Daniel Berlin]

>
> My motivation is to have basically similar statistic infrastructure for
> all our basic datastructures (we do have same for pools, vectors, ggc
> etc.).  I think people use it from time to time and it is very useful
> for memory tester, so the changes gets logged quite precisely.  The new
> testcase added to GCC triggers a lot of memory consumption in the
> bitmaps, so the bitmap related problems popped up few times in recent
> weeks/months.

So, even though i've mentioned to honza that i'm not necessarily a fan
of the trip counting stuff, I feel it is only fair to say that i do
believe the rest of the statistics are very useful.

Usually, you have to figure out what it tells you by impliciation (oh,
every time i stop in GDB, i seem to be in bitmap_ior, maybe i'm using
bitmaps too much :P)