From: ludo@gnu.org (Ludovic Courtès)
To: guix-devel <guix-devel@gnu.org>
Subject: For a slimmer GHC
Date: Thu, 29 Oct 2015 20:17:35 +0100 [thread overview]
Message-ID: <87io5pa3hs.fsf@gnu.org> (raw)
Hello!
GHC is insanely large, 1.2G for its closure, most of which is itself:
--8<---------------cut here---------------start------------->8---
store item total self
/gnu/store/1iwl222h2qw80fyr578sdjdki0pbcjm0-ghc-7.10.2 1209.7 860.5 71.1%
/gnu/store/k6r37137lfpg3l3igi50c7lj2za7kqly-ld-wrapper-0 153.7 0.0 0.0%
/gnu/store/czs63sm4l0s4a56ab38dqvkx19yzylbq-perl-5.16.1 141.2 49.2 4.1%
/gnu/store/hddjjpkfvwaf1j1q3qwpvby0rid3k8by-gcc-4.9.3 138.1 77.3 6.4%
/gnu/store/r539jrq7jk9vkmm1255i5jqs7skn4fag-ghc-7.10.2-doc 120.2 42.6 3.5%
/gnu/store/fmxxkrpwajcnb9cyncgh4f4z6ybknl1g-guile-2.0.11 109.0 16.1 1.3%
/gnu/store/y5psndwpbbkjrf856x757psb708y62dn-binutils-2.25.1 82.5 44.6 3.7%
/gnu/store/mnwjrkbfzkb5ifhqf8hssf3cxfvg11l6-coreutils-8.24 77.8 13.8 1.1%
/gnu/store/fzp98iyq7a2i4d4siw0ab0y0wa95vv8k-readline-6.3 68.6 1.2 0.1%
[...]
$ du -ms /gnu/store/1iwl222h2qw80fyr578sdjdki0pbcjm0-ghc-7.10.2/
871 /gnu/store/1iwl222h2qw80fyr578sdjdki0pbcjm0-ghc-7.10.2/
$ du -ms /gnu/store/1iwl222h2qw80fyr578sdjdki0pbcjm0-ghc-7.10.2/lib/ghc-7.10.2/
871 /gnu/store/1iwl222h2qw80fyr578sdjdki0pbcjm0-ghc-7.10.2/lib/ghc-7.10.2/
--8<---------------cut here---------------end--------------->8---
The main problem is that, for each module, we have three variants:
--8<---------------cut here---------------start------------->8---
$ du -ms /gnu/store/1iwl222h2qw80fyr578sdjdki0pbcjm0-ghc-7.10.2/lib/ghc-7.10.2/trans_3eG64VdP2vzGjP6wJiCp5X/*
3 /gnu/store/1iwl222h2qw80fyr578sdjdki0pbcjm0-ghc-7.10.2/lib/ghc-7.10.2/trans_3eG64VdP2vzGjP6wJiCp5X/Control
1 /gnu/store/1iwl222h2qw80fyr578sdjdki0pbcjm0-ghc-7.10.2/lib/ghc-7.10.2/trans_3eG64VdP2vzGjP6wJiCp5X/Data
5 /gnu/store/1iwl222h2qw80fyr578sdjdki0pbcjm0-ghc-7.10.2/lib/ghc-7.10.2/trans_3eG64VdP2vzGjP6wJiCp5X/libHStransformers-0.4.2.0-3eG64VdP2vzGjP6wJiCp5X.a
2 /gnu/store/1iwl222h2qw80fyr578sdjdki0pbcjm0-ghc-7.10.2/lib/ghc-7.10.2/trans_3eG64VdP2vzGjP6wJiCp5X/libHStransformers-0.4.2.0-3eG64VdP2vzGjP6wJiCp5X-ghc7.10.2.so
7 /gnu/store/1iwl222h2qw80fyr578sdjdki0pbcjm0-ghc-7.10.2/lib/ghc-7.10.2/trans_3eG64VdP2vzGjP6wJiCp5X/libHStransformers-0.4.2.0-3eG64VdP2vzGjP6wJiCp5X_p.a
--8<---------------cut here---------------end--------------->8---
What about removing all the .a? Would that be OK?
On that topic I found
<https://ghc.haskell.org/trac/ghc/wiki/DynamicByDefault> but it’s not
clear to me whether this is relevant here. At worst we can add a phase
that removes these files.
A secondary issue is documentation: There’s a “doc” output, but
‘ghc:out’ depends on ‘ghc:doc’:
--8<---------------cut here---------------start------------->8---
$ guix gc --references /gnu/store/1iwl222h2qw80fyr578sdjdki0pbcjm0-ghc-7.10.2/ | grep doc
/gnu/store/r539jrq7jk9vkmm1255i5jqs7skn4fag-ghc-7.10.2-doc
$ du -ms /gnu/store/r539jrq7jk9vkmm1255i5jqs7skn4fag-ghc-7.10.2-doc
47 /gnu/store/r539jrq7jk9vkmm1255i5jqs7skn4fag-ghc-7.10.2-doc
$ grep -r r539jrq7jk9vkmm1255i5jqs7skn4fag /gnu/store/1iwl222h2qw80fyr578sdjdki0pbcjm0-ghc-7.10.2
/gnu/store/1iwl222h2qw80fyr578sdjdki0pbcjm0-ghc-7.10.2/lib/ghc-7.10.2/package.conf.d/process-1.2.3.0-f0287ac288afc0705be775d1adda59ee.conf:haddock-interfaces: /gnu/store/r539jrq7jk9vkmm1255i5jqs7skn4fag-ghc-7.10.2-doc/share/doc/ghc/html/libraries/process-1.2.3.0/process.haddock
/gnu/store/1iwl222h2qw80fyr578sdjdki0pbcjm0-ghc-7.10.2/lib/ghc-7.10.2/package.conf.d/process-1.2.3.0-f0287ac288afc0705be775d1adda59ee.conf:haddock-html: /gnu/store/r539jrq7jk9vkmm1255i5jqs7skn4fag-ghc-7.10.2-doc/share/doc/ghc/html/libraries/process-1.2.3.0
/gnu/store/1iwl222h2qw80fyr578sdjdki0pbcjm0-ghc-7.10.2/lib/ghc-7.10.2/package.conf.d/Cabal-1.22.4.0-43c3ae30d75ac742e521d26b63721876.conf:haddock-interfaces: /gnu/store/r539jrq7jk9vkmm1255i5jqs7skn4fag-ghc-7.10.2-doc/share/doc/ghc/html/libraries/Cabal-1.22.4.0/Cabal.haddock
/gnu/store/1iwl222h2qw80fyr578sdjdki0pbcjm0-ghc-7.10.2/lib/ghc-7.10.2/package.conf.d/Cabal-1.22.4.0-43c3ae30d75ac742e521d26b63721876.conf:haddock-html: /gnu/store/r539jrq7jk9vkmm1255i5jqs7skn4fag-ghc-7.10.2-doc/share/doc/ghc/html/libraries/Cabal-1.22.4.0
--8<---------------cut here---------------end--------------->8---
Any idea if we could avoid references to the “doc” output in these
*.conf files? For instance, if there’s a variable like, say,
‘HADDOCK_PATH’, we can certainly remove the hardcoded references
Federico, Paul, Eric, … thoughts? :-)
Thanks,
Ludo’.
next reply other threads:[~2015-10-29 19:17 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-29 19:17 Ludovic Courtès [this message]
-- strict thread matches above, loose matches on Subject: below --
2015-11-02 11:23 For a slimmer GHC Federico Beffa
2015-11-02 14:11 ` Ludovic Courtès
2015-11-02 16:01 ` Federico Beffa
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