From: Davis Herring <herring@lanl.gov>
To: Stefan Monnier <monnier@IRO.UMontreal.CA>
Cc: Artur Malabarba <bruce.connor.am@gmail.com>,
emacs-devel <emacs-devel@gnu.org>
Subject: Re: [Emacs-diffs] scratch/package-fix e5d5cdf 1/2: emacs-lisp/package.el: Indicate incompatible packages.
Date: Thu, 12 Feb 2015 09:35:08 -0700 [thread overview]
Message-ID: <54DCD63C.5090000@lanl.gov> (raw)
In-Reply-To: <jwvmw4jjiyo.fsf-monnier+emacsdiffs@gnu.org>
> The algorithmic problem is quite real, indeed.
> We could solve it by adding a "compatible" field to the struct, which
> we'd set to `yes' or `no' (so as to memoize previous computations), so
> the complexity would stay linear in the number of packages (though also
> linear in the number of number of `requires').
The compatible flag need not be added to the struct; it could instead be
maintained in a hash table retained only for the duration of printing.
(Then it has to be recomputed once per listing, but as it's linear that
probably doesn't matter.)
Davis
--
This product is sold by volume, not by mass. If it appears too dense or
too sparse, it is because mass-energy conversion has occurred during
shipping.
next prev parent reply other threads:[~2015-02-12 16:35 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20150211170820.10979.16862@vcs.savannah.gnu.org>
[not found] ` <E1YLalx-0002s8-E8@vcs.savannah.gnu.org>
2015-02-11 19:28 ` [Emacs-diffs] scratch/package-fix e5d5cdf 1/2: emacs-lisp/package.el: Indicate incompatible packages Stefan Monnier
2015-02-11 23:00 ` Artur Malabarba
2015-02-12 14:41 ` Stefan Monnier
2015-02-12 16:35 ` Davis Herring [this message]
2015-02-13 13:48 ` Artur Malabarba
2015-02-12 21:42 ` chad
2015-02-13 20:13 ` Stefan Monnier
2015-02-13 20:18 ` Artur Malabarba
2015-02-14 18:04 ` Artur Malabarba
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