From: "Ludovic Courtès" <ludo@gnu.org>
To: Guix-devel <Guix-devel@gnu.org>
Subject: Re: Performance improvements
Date: Mon, 28 Oct 2019 00:06:25 +0100 [thread overview]
Message-ID: <87pnihg55a.fsf@gnu.org> (raw)
In-Reply-To: <87r23fknvz.fsf@gnu.org> ("Ludovic \=\?utf-8\?Q\?Court\=C3\=A8s\=22'\?\= \=\?utf-8\?Q\?s\?\= message of "Mon, 14 Oct 2019 23:39:28 +0200")
Hi!
Some more improvements come from these commits:
ac19950507 gnu: bootstrap: Cache the 'bootstrap-executable' origins.
5166d02730 gnu: bootstrap: 'bootstrap-origin' preserves eq?-ness when no changes are made.
d727a9343d derivations: Don't memoize 'derivation->bytevector'.
f5fca9a82c gexp: Cache the module to derivation mappings.
c57e417eff store: Allow objects in the cache to be inserted and search for with 'equal?'.
f58b45350b gexp: Add 'imported+compiled-modules'.
f726f6f802 derivations: 'build-expression->derivation' caches its module derivations.
cf7648f882 derivations: Introduce 'imported+compiled-modules'.
This caches the module-to-derivation mapping, which wasn’t cached until
now.
Overall the goal is to have the high-level caches work nicely (the
“object cache” in particular), rendering the low-level caches (such as
the ‘add-data-to-store’ cache) potentially useless. This is beneficial
because a cache hit on the object cache saves more CPU time than a cache
hit on a low-level cache.
Ludovic Courtès <ludo@gnu.org> skribis:
> $ time guix build libreoffice -nd
> /gnu/store/8drmbhsrayr2j5lkvrwq37rg8g06hgsw-libreoffice-6.1.5.2.drv
>
> real 0m2.142s
> user 0m2.323s
> sys 0m0.082s
> $ guix describe
> Generacio 110 Oct 14 2019 08:43:33 (nuna)
> guix bd04fe8
> repository URL: https://git.savannah.gnu.org/git/guix.git
> branch: master
> commit: bd04fe878627a14533d908ccdf5b906050d6e0a4
And now:
--8<---------------cut here---------------start------------->8---
$ time /tmp/new/bin/guix build libreoffice -nd
/gnu/store/ibzap0v1c367h0j2mdd2jmlsfx9jplfb-libreoffice-6.1.5.2.drv
real 0m1.658s
user 0m1.699s
sys 0m0.073s
$ /tmp/new/bin/guix describe
Generacio 1 Oct 28 2019 00:03:05 (nuna)
guix 271b3c9
repository URL: https://git.savannah.gnu.org/git/guix.git
branch: master
commit: 271b3c9d16f8880f4a27b52a615cdec611322fae
--8<---------------cut here---------------end--------------->8---
Ludo’.
next prev parent reply other threads:[~2019-10-27 23:06 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-14 21:39 Performance improvements Ludovic Courtès
2019-10-15 6:35 ` Pierre Neidhardt
2019-10-15 7:24 ` Jan Nieuwenhuizen
2019-10-19 20:17 ` Ludovic Courtès
2019-10-15 8:21 ` Dimakakos Dimos
2019-10-15 18:21 ` Efraim Flashner
2019-10-19 20:17 ` Ludovic Courtès
2019-10-27 23:06 ` Ludovic Courtès [this message]
2019-10-28 7:44 ` Pierre Neidhardt
2019-10-28 7:56 ` Efraim Flashner
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=87pnihg55a.fsf@gnu.org \
--to=ludo@gnu.org \
--cc=Guix-devel@gnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this external index
https://git.savannah.gnu.org/cgit/guix.git
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.