cc1plus memory consumption

[S T]

>Id be guessing on the CFLAGS used.
>Did you use similar CFLAGS in your tests on the RH system? 

>This can create sizable differences in compile time and memory used.

I did use the same C/CXXFLAGS for the testing.
I used "-march=pentium3 -O3 -pipe".
I also tried the -fno-inline, it helped a bit, but still doesn't explain the large memory consumption differences between the two compilers.