i've checked 4.1 vs 4.3 on my c++ codebase and 4.3 doesn't look good. more time/mem details are in attached logs.
testcase was compiled with following options: -m32 -D_STLP_DEBUG -D_STLP_DEBUG_MODE_THROWS -D_DEBUG -pthread \ -Wall -Wno-uninitialized -Woverloaded-virtual -Werror \ -march=i686 -mtune=pentium4 -O1 -gdwarf-2 -g2 -fPIC -- Summary: time/memory hog for large c++ source. Product: gcc Version: 4.3.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: other AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: pluto at agmk dot net GCC target triplet: i486-gnu-linux http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35858