Re: benefits of using of ccache?

[Stef van der Made <svdmade planet nl>]

I didn't do too much. I set the ccache setting in the gar.conf.mk file 
and started compiling. I didn't change the build location between builds 
as I had a nice build going for a few weeks. I just swapped so I'll be 
able to see on the next build if I'm still seeing performance 
improvements with a changed build prefix. (let me start a build to see 
what happens and I'll get back to this list soon.

Cheers.

Stef

Cheers,

Stef

J. Gardner Biggs wrote:

> On Fri, 2004-10-29 at 19:18 +0200, Stef van der Made wrote:
>  
>
> > Hi Paul,
> >
> > While building the full suite of Garnome I see the cache grow until it 
> > reaches about 1.1GB after several updates. I think that 1 GB is enough 
> > when you build without using too much of boostrap and bindings.  It does 
> > speed up the build quite conciderably on my box :-)
> >    
>
> Stef:
>
> What did you do in setting up ccache, and/or changes to gar.conf.mk to
> get it to work for you?
>
> Did changing the install prefix negate any benefits of using ccache for
> me?  I am just perplexed why I didn't see any benefits.
>
> Thanks.
>
>  
>
> > Cheers,
> >
> > Stef
> >
> > Paul Drain wrote:
> >
> >    
> >
> > > > To see if ccache would speed up things, I changed the install prefix and
> > > > fired up /desktop make paranoid-install.  It is now been crunching away
> > > > for 4 hours now with an eye-balled finishing time of 6 hrs.
> > > >   
> > > >
> > > >        
> > > The *first* time you compile something with ccache, there is no visible
> > > effect -- preprocessed objects can be compiled quicker (the first copy
> > > in the cache gets used for all subsequent builds), but everything else
> > > works like a normal compile.
> > >
> > > The next time, (or if you run 'make clean; make install' in an
> > > individual directory) is *much* faster - depending on disc speed and the
> > > amount of caching space you request.
> > >
> > > The reason I recommend bumping the cache space up, is that ccache will
> > > flush the cache of expired objects when there is less than 10% (I think)
> > > room remaining -- and when you're building Mozilla, it evicts objects
> > > quite frequently.
> > >
> > > Of course, you can check all this information out by running 'ccache -s'
> > >      
> > >
> > > from the prompt :)
> >    
> >
> > > Regards,
> > >
> > > Paul
> > >
> > >
> > >
> > >