Re: NSImageView Draw Performance

[Andreas Höschler]

Hi all,

I compared the "ldd /opt/GNUstep/Local/Tools/ESMMapServer" output on both 
machines. Looks identical!

The only difference between the two machine except the different CPUs is that I 
once played around with Cairo on the development machine. However, I switched 
back to the art backend since the cairo backend had issues (with my rather old 
GNUstep tree) or don't remember any more. But how can this effect the draw 
performance (art on both machines now)!?

Thanks,

 Andreas



> Hi all,
> 
> I have developed an app that draws OSM maps like so:
> 
> NSImageView subclass:
> ==========================
> - (void)drawRect:(NSRect)rect
> {
>      [[NSColor whiteColor] set];
>      NSRectFill(rect);   
> 
>      NSBezierPath *path = [mapPath bezierPath];
>      ...
>      [path fill];
>      ...
> 
>      NSBezierPath *path = [mapPath bezierPath];
>      ...
>      [path stroke];
>      ...
> }
> 
> On my development machine
> 
> System Configuration: SUN MICROSYSTEMS SUN FIRE X4170 SERVER          
> Intel(R) Xeon(R) CPU           E5540  @ 2.53GHz CPU 1
> Intel(R) Xeon(R) CPU           E5540  @ 2.53GHz CPU 2
> 
> drawing the map/image (execution of the drawRect: code) is ultra fast (no 
> delay at all).
> 
> However, on the production system
> 
> System Configuration: Sun Microsystems     Sun Fire X4240 (2.7GHz)
> Quad-Core AMD Opteron(tm) Processor 2384 CPU 1
> Quad-Core AMD Opteron(tm) Processor 2384 CPU 2
> 
> drawing the image (execution of the drawRect: code) takes 3-4s! :-( I do not 
> want to believe that the Xenon CPU is so much faster and rather suppose a 
> difference in the set of installed (used) libraries!? I use
> 
>       rsync -avz -e ssh /opt/GNUstep root@<target machine>:/opt
> 
> to deploy my software. So at least everything below /opt/GNUstep must be 
> identical!?
> 
> I am clueless!! What can I do to find out which non-GNUstep libs responsible 
> for drawling are used and why drawing takes so long on the target machine? 
> Any ideas?
> 
> Thanks a lot in advance,
> 
>  Andreas
> 
> 
> 
> BTW: My GNUstep tree is a couple of years old:
> 
>       cd back
>       ./configure
>       make
>       make install
> 
> 
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