Thank you for the answer. We haven't found explanation for decreased performance of compiled $ROOTSYS/test/hsimple.cxx. One other thing which we would like to try is to use g++ 3.2 compiler. Maybe somebody has experience if one can expect big performance difference between code compiled with gcc 2.96 (RH 7.1-7.3 standard) and gcc 3.2? Andrzej Kupsc On Fri, 9 May 2003, Rene Brun wrote: > Hi Andrzej, > > I cannot reproduce this problem with $ROOTSYS/test/hsimple.cxx. > > The main difference between 3.04 and 3.05 is the introduction by default > of the True Type Fonts. If you run the benchmarks.C with 3.04 without > using TTF and 3.05 with TTF, you may see a factor 2 on graphics > applications. If you use the new 3.05/05, you can disable TTF in system.rootrc. > We will work on the speed improvements with TTF. > > Rene Brun > > Andrzej Kupsc wrote: > > > > Hej, > > > > We have found that some of our root based applications seems to run > > 2-4 times slower with root_v3.05.04 as compared to root_v3.04.02. > > > > In order to find the reason of decreased performance we have run standard > > root benchmarks with precompiled root versions as well as root_v3.05.04 > > compiled from sources. > > The comparison was done on the same computers with the only difference > > being root version used. Most dramatic difference is with > > $ROOTSYS/test/hsimple.cxx which seems to be more than 4 times slower with > > ROOT 3.05/04. > > Does anyone observed similar decrease of performance with root_v3.05.04 > > or have hints what could be wrong? > > > > Andrzej Kupsc > > --------------------------------------------------------------- > > The Svedberg Laboratory, > > Uppsala University, Uppsala. > > ---------------------------------------------------------------
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