[Bug libstdc++/51386] [4.7 Regression]: 23_containers/unordered_set/hash_policy/load_factor.cc execution timeout

[fdumont at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51386

--- Comment #7 from François Dumont <fdumont at gcc dot gnu.org> 2011-12-05 20:55:59 UTC ---
The problem is in the hash policy, while computing _M_prev_resize the max load
factor is not always considered. The result is that when max load factor is
lower than 1 the hashtable is rehashed almost each time we insert a new
element.

I have submitted a patch on mailing list and wait for its approval. Sorry for
the inconvenience.

Note that memory was not really a suspect cause the hash code is not put in
cache for integral types like the int used in the test.