Re: [gentoo-dev] Portage ebuild cruft

[Jason Stubbs <jstubbs@gentoo.org>]

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On Saturday 30 April 2005 00:59, Thomas de Grenier de Latour wrote:
> On Fri, 29 Apr 2005 23:38:58 +0900
>
> Jason Stubbs <jstubbs@gentoo.org> wrote:
> > Yep. That's the scanning of all installed packages for any
> > provided virtuals.
>
> Maybe that's a stupid idea, but I wonder whether removing empty
> PROVIDE files from the vardb could save some time here.  I see
> that in grabfile(), if the file can't be opened, then an empty
> list is returned, so it would have the same behavior.  Does
> reading an empty file takes more time than failing to open a
> non-existing one?  (Yep, I don't know much about how filesystems
> actually work...)

real    0m9.925s	# With
real    0m9.913s	# Without

That's timings for 20 imports of portage. Can't really confirm either way from 
those results. It might make a difference when the system cache is empty. My 
as yet unnumbered virtuals glep would negate this altogether. ;)

Regards,
Jason Stubbs

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