Klaus: Perhaps your problem is related to PR 26854:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26854 See in particular comment 70, which has some statistics.If you're building your own gcc, configure gcc with --enable-gather- detailed-mem-stats and compile your program with -ftime-report -fmem- report and you'll get more detailed statistics that might give more insight.
Brad
