Barak A. Pearlmutter writes: > Success! > > Some working magic seems to be this: > > gcc -s -o particle1 \ > -O3 \ > -march=k8 \ > -mfpmath=sse \ > -finline-limit=100000 \ > --param large-function-insns=1000000 \ > --param inline-unit-growth=1000000 \ > --param sra-field-structure-ratio=0 \ > particle1.c -lm > > although it looks like -Os gives an additional improvement. > > This (with GCC 4.1) reduces code volume to about 16k from a previous > near 1M, and reduces runtime by a factor of about 2700, as compared to > just -O3. > > Further improvements welcome. > > I'd also suggest adding a section to the GCC documentation on "how to > use GCC as a back-end to another compiler" which gives some typical > magic options like the above that would be useful in circumstances > like these. http://gcc.gnu.org/wiki Enjoy... Andrew.
