See the timing, testcase is the usual mktime test from autoconf : [~]> gcc -O2 -o mktime mktime.c [~]> time ./mktime zsh: alarm ./mktime ./mktime 32,22s user 27,70s system 99% cpu 1:00,00 total
[~]> gcc -o mktime mktime.c [~]> time ./mktime ./mktime 0,04s user 0,03s system 100% cpu 0,067 total [~]> gcc -v Using built-in specs. Target: i686-pc-linux-gnu Configured with: ../configure --prefix=/usr --bindir=/usr/i686-pc-linux-gnu/gcc/4.3.0 --includedir=/usr/lib/gcc/i686-pc-linux-gnu/4.3.0/include --datadir=/usr/share/gcc/i686-pc-linux-gnu/4.3.0 --mandir=/usr/share/gcc/i686-pc-linux-gnu/4.3.0/man --infodir=/usr/share/gcc/i686-pc-linux-gnu/4.3.0/info --with-gxx-include-dir=/usr/lib/gcc/i686-pc-linux-gnu/4.3.0/include/g++-v3 --host=i686-pc-linux-gnu --build=i686-pc-linux-gnu --disable-libgcj --disable-libssp --disable-multilib --disable-nls --disable-werror --enable-checking=release --enable-clocale=gnu --enable-__cxa_atexit --enable-languages=c,c++,fortran,objc,obj-c++,treelang --enable-libstdcxx-allocator=new --enable-shared --enable-ssp --enable-threads=posix --enable-version-specific-runtime-libs --without-included-gettext --without-system-libunwind --with-system-zlib --with-pkgversion='Pardus Linux' --with-bugurl=http://bugs.pardus.org.tr Thread model: posix gcc version 4.3.0 20071215 [trunk revision 130952] (Pardus Linux) -- Summary: [4.3 regression] Standard autoconf mktime test is too slow when compiled with -O2 Product: gcc Version: 4.3.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: middle-end AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: ismail at pardus dot org dot tr http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34477
