[vtk-developers] very long build times

[Ken Martin]

Hey John,

That's pants. Something is wrong with your system. On my old 1.0 Ghz
Athlon with 768 MB ram VC6, VTK with Tcl builds in about 55 minutes. On
my new system (~2.5 GHz P4) which is VS7 it builds in 40 minutes.
Clearly from your 2% CPU usage there is a problem. I assume you are
building to a local disk and not a network or USB 1.0 disk, etc. That
would certainly slow you down if that were the case. A disk defrag might
help if nothing else comes to mind, but with the times you are talking I
think there is a more significant cause. I don't think there is any
configuration option in CMake that could account for this. Other less
plausible options :-)

1) You are probably using 50Hz power instead of 60Hz, that's 18% slower
right there. (not even counting the difference in PAL's 25Hz and NTSC's
~30Hz which is impacting your monitor :-)

2) You are using 240 Volts instead of 120. Faster CPU's tend to run at
lower voltages so that could be impacting your CPU.

3) Don't forget the time zone difference. England is 19 hours behind US
East Coast time (OK 5 hours ahead really). Add those 19 hours to a
typical one hour build and you get 20 hours which is what you are
seeing.

Thanks
Ken


> -----Original Message-----
> From: vtk-developers-admin at public.kitware.com [mailto:vtk-developers-
> admin at public.kitware.com] On Behalf Of John Biddiscombe
> Sent: Thursday, February 20, 2003 4:51 AM
> To: vtk-developers at public.kitware.com
> Subject: [vtk-developers] very long build times
> 
> I've not been using Visual studio long for building vtk, but it's
taking
> about 20 hours per go. (I left it running last night and it's still
only
> half way through Graphics - same trouble last time I updated several
weeks
> ago).
> 
> It looks like CPU usage is hovering around 2% so I suspect this is not
a
> vtk
> issue, but rather a disk thrashing problem. Is there any kind of tweak
> that
> one needs to make (either in CMake or in the project options) to
encourage
> a
> faster build. It didn't used to be like this (ie it used to build
quite
> quickly in VS when I first started using it).
> 
> Building from Cmd line using
> "C:/Program Files/Microsoft Visual Studio .NET/Common7/IDE/devenv.com"
> VTK.sln /build Debug /project ALL_BUILD
> 
> 1.7GHz AMD + 768MB + Virtual ram = 4GB.
> 
> Any tips greatfully received.
> 
> JB
> 
> 
> 
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