On Thursday 06 Aug 2015 22:00:35 Neil Bothwick wrote: > On Thu, 6 Aug 2015 21:53:25 +0200, Alan McKinnon wrote: > > > I only have it enabled for LibreOffice, which is a regular victim of > > > @preserved-rebuild causing the same version to be rebuilt. > > > > What sort of improvements do you get? libreoffice here takes about 1h30 > > to build, give or take 10 mins or so. Doesn't seem worth the extra > > hassle of ccache for an hour and a half. > > It varies, but it can more than halve the time taken. Well worth the > minute or two it took to set it up to happen automatically. > > % cat /etc/portage/env/ccache.conf > FEATURES="ccache" > > % cat /etc/portage/package.env/libreoffice > app-office/libreoffice ccache.conf disk-tmpdir.conf > > And don't forget to emerge ccache ;-) > > For completeness, LO also uses and on disk TMPDIR because my tmpfs /tmp > isn't big enough, so > > % cat /etc/portage/env/disk-tmpdir.conf > PORTAGE_TMPDIR="/mnt/scratch"
Hmm ... may be I should re-enable it to see if I notice the difference on an old PC I have. I took it off because failed ebuilds would continue to fail - until I remembered to delete the ccache files. -- Regards, Mick
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