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Subject: Re: Building emacs-yaml with emacs takes approximately eternity
From: Liliana Marie Prikler <liliana.prikler@HIDDEN>
To: Tomas Volf <~@wolfsden.cz>, 72921 <at> debbugs.gnu.org
Date: Sun, 01 Sep 2024 08:45:50 +0200
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Am Samstag, dem 31.08.2024 um 23:01 +0200 schrieb Tomas Volf:
> The emacs-yaml package is configured to build against emacs-minimal,
> which seems to work.=C2=A0 When you however switch to emacs package, it
> takes way to long to build, much longer than compiling for example
> firefox package.=C2=A0 That feels off.
>=20
> --8<---------------cut here---------------start------------->8---
> $ time guix time-machine -q --
> commit=3Db8327cb31199fb9f4ebed6c53a59601d41def5a1 -- build --check --
> no-grafts -q --with-input=3Demacs-minimal=3Demacs-minimal emacs-yaml
> /gnu/store/8lqdd8yna92zqgsgip396a1wbyhr5pfn-emacs-yaml-0.5.5
> 12.573 secs
> $ time guix time-machine -q --
> commit=3Db8327cb31199fb9f4ebed6c53a59601d41def5a1 -- build --check --
> no-grafts -q --with-input=3Demacs-minimal=3Demacs emacs-yaml
> /gnu/store/ja9xfndhfafjczp6n7qfy1h21hvdpd5j-emacs-yaml-0.5.5
> 2869.878 secs
> --8<---------------cut here---------------end--------------->8---
>=20
> The difference is huge.=C2=A0 The process taking vast majority of the tim=
e
> (in the emacs version) is this one:
>=20
> --8<---------------cut here---------------start------------->8---
> 32393 guixbuil 47:10 {.emacs-29.4-rea}
> /gnu/store/y7yhpgi48klqpadrmfknl4bln9c4n05y-emacs-29.4/bin/emacs -no-
> comp-spawn -Q --batch -l /tmp/guix-build-emacs-yaml-0.5.5.drv-
> 0/emacs-int-comp-yaml-pbHFU3.el
> --8<---------------cut here---------------end--------------->8---
>=20
> I do not know enough to even guess what could be the problem, but it
> was suggested I should bug-report this.
This issue has already been reported updstream [1], but not addressed
yet: What takes so long between emacs-minimal and plain emacs is the
fact that plain emacs does native compilation. =20
emacs-build-system currently uses native compilation whenever that is
supported by the emacs used to build. Perhaps we should allow for some
choice here =E2=80=93 ideas welcome.
Cheers
[1] https://github.com/zkry/yaml.el/issues/53
bug-guix@HIDDEN:bug#72921; Package guix.
Full text available.
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From: Tomas Volf <~@wolfsden.cz>
To: bug-guix@HIDDEN
Subject: Building emacs-yaml with emacs takes approximately eternity
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--=-=-=
Content-Type: text/plain
Content-Transfer-Encoding: quoted-printable
The emacs-yaml package is configured to build against emacs-minimal,
which seems to work. When you however switch to emacs package, it takes
way to long to build, much longer than compiling for example firefox
package. That feels off.
=2D-8<---------------cut here---------------start------------->8---
$ time guix time-machine -q --commit=3Db8327cb31199fb9f4ebed6c53a59601d41de=
f5a1 -- build --check --no-grafts -q --with-input=3Demacs-minimal=3Demacs-m=
inimal emacs-yaml
/gnu/store/8lqdd8yna92zqgsgip396a1wbyhr5pfn-emacs-yaml-0.5.5
12.573 secs
$ time guix time-machine -q --commit=3Db8327cb31199fb9f4ebed6c53a59601d41de=
f5a1 -- build --check --no-grafts -q --with-input=3Demacs-minimal=3Demacs e=
macs-yaml
/gnu/store/ja9xfndhfafjczp6n7qfy1h21hvdpd5j-emacs-yaml-0.5.5
2869.878 secs
=2D-8<---------------cut here---------------end--------------->8---
The difference is huge. The process taking vast majority of the time
(in the emacs version) is this one:
=2D-8<---------------cut here---------------start------------->8---
32393 guixbuil 47:10 {.emacs-29.4-rea} /gnu/store/y7yhpgi48klqpadrmfknl4bln=
9c4n05y-emacs-29.4/bin/emacs -no-comp-spawn -Q --batch -l /tmp/guix-build-e=
macs-yaml-0.5.5.drv-0/emacs-int-comp-yaml-pbHFU3.el
=2D-8<---------------cut here---------------end--------------->8---
I do not know enough to even guess what could be the problem, but it was
suggested I should bug-report this.
Cheers,
Tomas
=2D-=20
There are only two hard things in Computer Science:
cache invalidation, naming things and off-by-one errors.
--=-=-=
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--=-=-=--
Tomas Volf <~@wolfsden.cz>:bug-guix@HIDDEN.
Full text available.bug-guix@HIDDEN:bug#72921; Package guix.
Full text available.
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