[sldev] I just sped up compile time by 4x

[Latif Khalifa]

Shouldn't just adding /MP to compile flags be enough? I recall docu
saying that /MP will default number of concurrent compiles, to number
of CPUs in the box.

On Sun, Oct 18, 2009 at 8:22 AM, Brandon Husbands <xotmid at gmail.com> wrote:
> Using visual studio express 2005
> Time to compile from clean install: about 15 mins.
> Computer Specs
> Quad core 3.g each proc
> 6g memory
> Vista home Prem
>
>
> How?
> edit C:\libs\linden\indra\cmake\00-Common.cmake
>
>
> set these values
> set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} /Od /Zi /MDd /MP4"
>       CACHE STRING "C++ compiler debug options" FORCE)
>   set(CMAKE_CXX_FLAGS_RELWITHDEBINFO
>       "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} /Od /Zi /MD /MP4"
>       CACHE STRING "C++ compiler release-with-debug options" FORCE)
>   set(CMAKE_CXX_FLAGS_RELEASE
>       "${CMAKE_CXX_FLAGS_RELEASE} ${LL_CXX_FLAGS} /O2 /Zi /MD /MP4"
>       CACHE STRING "C++ compiler release options" FORCE)
>
> the value i addes was the /MP4
> http://msdn.microsoft.com/en-us/library/bb385193.aspx
> Multi proccessor 4 since i have 4 cpus
>
> My cpus were at 100% the whole time and i was surfing, editing files etc.
> Previously i was at 100% on only 1 cpu.
> Also in the build in run options i set my max to 10 just for some overkill.
> if i would have set this to one it probably would have built faster there
> would not have been a io wait
> Ill do another test soon!
>
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