Am Montag, 30. Mai 2005 22:33 schrieb Gerrit P. Haase: > Anonymous wrote: > > > My System: > > #Set-up: > > > > $ g++ cygspd.cc -o cygspd-basic > > $ g++ -O7 cygspd.cc -o cygspd-o7 > > $ g++ -fno-exceptions cygspd.cc -o cygspd-ne > > $ g++ -O7 -fno-exceptions cygspd.cc -o cygspd-ne-o7 > > $ g++ -mno-cygwin cygspd.cc -o cygspd-mingw > > $ g++ -O7 -mno-cygwin cygspd.cc -o cygspd-mingw-o7 > > $ g++ -fno-exceptions -mno-cygwin cygspd.cc -o cygspd-mingw-ne > > $ g++ -O7 -fno-exceptions -mno-cygwin cygspd.cc -o cygspd-mingw-ne-o7 > > > > # cygwin.dll 1.5.17 > [...] > > $ /bin/time -f "%E %S %U" cygspd-mingw cygspd.dat > > 0:03.11 0.00 0.02 > > $ /bin/time -f "%E %S %U" cygspd-mingw-o7 cygspd.dat > > 0:01.50 0.01 0.02 > > $ /bin/time -f "%E %S %U" cygspd-mingw-ne cygspd.dat > > 0:02.60 0.00 0.02 > > $ /bin/time -f "%E %S %U" cygspd-mingw-ne-o7 cygspd.dat > > 0:01.50 0.01 0.01 > > > > #Snapshot DLL (No changes were made except swapping the dll. > [...] > > $ /bin/time -f "%E %S %U" cygspd-mingw cygspd.dat > > 0:02.78 0.00 0.01 > > $ /bin/time -f "%E %S %U" cygspd-mingw-o7 cygspd.dat > > 0:01.51 0.01 0.01 > > $ /bin/time -f "%E %S %U" cygspd-mingw-ne cygspd.dat > > 0:02.52 0.00 0.02 > > $ /bin/time -f "%E %S %U" cygspd-mingw-ne-o7 cygspd.dat > > 0:01.45 0.00 0.01 > > Interesting, why is it faster when running a binary that doesn't > depend on cygwin1.dll after swapping the DLL? Some Win caching mechanism?
I recognized this caching behavior with KDE/cygwin too. Under http://cvs.sourceforge.net/viewcvs.py/kde-cygwin/tools/fillmem/ there is a tool, which could be used to minimize this influcence by clearing this cache. See the README for more informations. Ralf -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
