build time optimization

[Enrico Weigelt]

Hi,

> It is not that certain that ramdisk on linux really helps.
> ramdisk eat-up memory that cannot be used for fs-cache...
> so ramdisk will increase the cache-miss at the kernel level...

I've used ramdisks for automatic mass builds on some other projects,
and it really helped (IIRC factor >10). But the scenario there was
a bit different: much smaller codebases and the machines had a lot
of ram (16GB), and i didn't want to keep the actual build output,
just know whether it builds at all and certain post-tests succeed.

I guess, we only find out if we try ;-o

> I have not tested ramdisk on Windows, so I do not know how effective
> it is.

On what I remember from certain large enterprise hosting projects,
Windows (at least pre Win7) was pretty bad in IO (the OS itself keeps
the stores quite busy for certain housekeeping tasks, so at least on
short load peaks that was quite unpleasent - no idea if that really
matters much in this scenario).


cu
-- 
Mit freundlichen Grüßen / Kind regards 

Enrico Weigelt 
VNC - Virtual Network Consult GmbH 
Head Of Development 

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enrico.weigelt at vnc.biz; www.vnc.de