Subj : speed of release executables: vc++ vs. bcb
To   : borland.public.cpp.borlandcpp
From : portnoy@freenet.de (PDQBach)
Date : Mon Apr 19 2004 01:17 am

Hello,

im a visual c++ und borland c++builder newbie.
i have witten a simple mandelbrot algorithm and compiled it with both
vc++ (mfc) and cbuilder 6 trail (vcl) (same code besides the drawing part).
the vc++ version is twice! as fast in release mode. in debug mode its
as fast as cbuilder. it seems i cant get cbuilder to compile a real
release version. when i check "Project options:compiler:release" it
even gets slower than debug! i have played around a bit with the
advanced compiler options without any result. i also dropped the
drawing part, supposing that it causes slowdown somehow. the cbuilder
version is not faster than the same code on delphi 7 trial(maybe the same
problem). what can i do? i cant believe cbuilder (and delphi) to be
that much slower than vc++. i think its just a problem of finding the
right compiler options. are there any limitations to the trial versions?

thank you.

code:

        for (y=0;y<ymax;y++)
                {
                for (x=0;x<xmax;x++)
                        {
                        cox=x*xscale+leftside;
                        coy=y*yscale+top;
                        zx=0;
                        zy=0;
                        colorcounter=0;
                        betrq=0;
                        zaehler=0;
                        while (colorcounter<maxiter && betrq<bailout)
                                {
                                tempx=zx*zx-zy*zy+cox;
                                zy=2*zx*zy+coy;
                                zx=tempx;
                                colorcounter=colorcounter+1;
                                betrq=zx*zx+zy*zy;
                                }
                        
                        if (betrq<bailout) /*draw black pixel at x,y*/;
                        else /*draw white pixel at x,y*/); 
                        }
                }


system:
vc++: visual studio 6.0
c++builder 6 enterprise trial
windows xp home sp1
intel pentium m (centrino) 1400mhz

.