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[Bug libstdc++/54075] [4.7.1] unordered_map 3x slower than 4.6.2
- From: "fdumont at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 26 Jul 2012 12:31:56 +0000
- Subject: [Bug libstdc++/54075] [4.7.1] unordered_map 3x slower than 4.6.2
- Auto-submitted: auto-generated
- References: <bug-54075-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54075
--- Comment #13 from FranÃois Dumont <fdumont at gcc dot gnu.org> 2012-07-26 12:31:56 UTC ---
Author: fdumont
Date: Thu Jul 26 12:31:50 2012
New Revision: 189889
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=189889
Log:
2012-07-26 FranÃois Dumont <fdumont@gcc.gnu.org>
PR libstdc++/54075
* include/bits/hashtable.h
(_Hashtable<>::_Hashtable(_InputIterator, _InputIterator,
size_type, ...): Remove std::max usage to guarantee that hashtable
state is consistent with hash policy state.
(_Hashtable<>::rehash): Likewise. Set _M_prev_resize to 0 to avoid
the hashtable shrinking on next insertion.
* testsuite/23_containers/unordered_set/modifiers/reserve.cc: New.
* testsuite/23_containers/unordered_multiset/modifiers/reserve.cc: New.
* testsuite/23_containers/unordered_map/modifiers/reserve.cc: New.
* testsuite/23_containers/unordered_multimap/modifiers/reserve.cc: New.
Added:
branches/gcc-4_7-branch/libstdc++-v3/testsuite/23_containers/unordered_map/modifiers/reserve.cc
branches/gcc-4_7-branch/libstdc++-v3/testsuite/23_containers/unordered_multimap/modifiers/reserve.cc
branches/gcc-4_7-branch/libstdc++-v3/testsuite/23_containers/unordered_multiset/modifiers/reserve.cc
branches/gcc-4_7-branch/libstdc++-v3/testsuite/23_containers/unordered_set/modifiers/reserve.cc
Modified:
branches/gcc-4_7-branch/libstdc++-v3/ChangeLog
branches/gcc-4_7-branch/libstdc++-v3/include/bits/hashtable.h