Removing/replacing “Guix in action” video from the home page?

Removing/replacing “Guix in action” video from the home page?

[Ludovic Courtès]

Hello Guix!

The home page has a “Guix in action” video that’s becoming outdated.  It
would be nice to have an updated version of it using in particular the
short aliases (‘guix search’, ‘guix install’, etc.).  Perhaps we could
use ‘emacs-gif-screencast’ to make it hopefully lightweight non-blurry
(and with a larger font size).

There’s also some overlap with the “Everyday Guix video”, though it’s
not quite the same either.

Thoughts?  Any volunteers to produce an updated version?  :-)

Ludo’.

Re: Removing/replacing “Guix in action” video from the home page?

[Luis Felipe]

Hi,

‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Monday, October 12, 2020 12:59 PM, Ludovic Courtès <ludo@gnu.org> wrote:

> Hello Guix!
>
> The home page has a “Guix in action” video that’s becoming outdated. It
> would be nice to have an updated version of it using in particular the
> short aliases (‘guix search’, ‘guix install’, etc.). Perhaps we could
> use ‘emacs-gif-screencast’ to make it hopefully lightweight non-blurry
> (and with a larger font size).

Or maybe try with asciinema to record video. The problem I see with GIF for this is that people don't have playback control.

Re: Removing/replacing “Guix in action” video from the home page?

[Joshua Branson]

I send a ton of time making videos online, so I can probably spare some
time to do this.  I'll have a video posted in a day or two.

Thanks,

Joshua

--
Joshua Branson
Sent from Emacs and Gnus
https://gnucode.me
https://video.hardlimit.com/accounts/joshua_branson/video-channels
"You can have whatever you want, as long as you help enough other people get what they want." - Zig Ziglar

Re: Removing/replacing “Guix in action” video from the home page?

[Bonface M. K.]

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Joshua Branson <jbranso@dismail.de> writes:

> I send a ton of time making videos online, so I can probably spare some
> time to do this.  I'll have a video posted in a day or two.
>
> Thanks,
>
> Joshua
>

What's your video setup look like? Moreso [free]
tools that you'd use to cut, splice and clean
audio.

> --
> Joshua Branson
> Sent from Emacs and Gnus
> https://gnucode.me
> https://video.hardlimit.com/accounts/joshua_branson/video-channels
> "You can have whatever you want, as long as you help enough other people get what they want." - Zig Ziglar
>
>

-- 
Bonface M. K. (https://www.bonfacemunyoki.com)
Chief Emacs Mchochezi / Twitter: @BonfaceKilz
GPG key = D4F09EB110177E03C28E2FE1F5BBAE1E0392253F

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Re: Removing/replacing “Guix in action” video from the home page?

[Ludovic Courtès]

Hi,

Luis Felipe <luis.felipe.la@protonmail.com> skribis:

>> The home page has a “Guix in action” video that’s becoming outdated. It
>> would be nice to have an updated version of it using in particular the
>> short aliases (‘guix search’, ‘guix install’, etc.). Perhaps we could
>> use ‘emacs-gif-screencast’ to make it hopefully lightweight non-blurry
>> (and with a larger font size).
>
> Or maybe try with asciinema to record video. The problem I see with GIF for this is that people don't have playback control.

Right.  Asciinema is nice but we’d need to serve a whole bunch of JS.
Perhaps the ideal thing would be to fall back to Webm/GIF when JS is
unavailable…

Ludo’.

Re: Removing/replacing “Guix in action” video from the home page?

[Joshua Branson]

I would describe my video set up as pretty simple:

$ wf-recorder --audio

If you watch any of my below videos, you'll see me take breaks like, "Oh
hold on just a second, I think my landlord is knocking at my front
door. I'll be right back."

-- 
Joshua Branson
Sent from Emacs and Gnus
https://gnucode.me
https://video.hardlimit.com/accounts/joshua_branson/video-channels
"You can have whatever you want, as long as you help enough other people get what they want." - Zig Ziglar

Re: Removing/replacing “Guix in action” video from the home page?

[Luis Felipe]

‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Tuesday, October 13, 2020 8:39 PM, Ludovic Courtès <ludo@gnu.org> wrote:

> Hi,
>
> Luis Felipe luis.felipe.la@protonmail.com skribis:
>
> > > The home page has a “Guix in action” video that’s becoming outdated. It
> > > would be nice to have an updated version of it using in particular the
> > > short aliases (‘guix search’, ‘guix install’, etc.). Perhaps we could
> > > use ‘emacs-gif-screencast’ to make it hopefully lightweight non-blurry
> > > (and with a larger font size).
> >
> > Or maybe try with asciinema to record video. The problem I see with GIF for this is that people don't have playback control.
>
> Right. Asciinema is nice but we’d need to serve a whole bunch of JS.
> Perhaps the ideal thing would be to fall back to Webm/GIF when JS is
> unavailable…


JS? Oh no. I thought asciinema generated a video only (I haven't use it myself). We only need webm video.

Re: Removing/replacing “Guix in action” video from the home page?

[Bonface M. K.]

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Joshua Branson <jbranso@dismail.de> writes:

> I would describe my video set up as pretty simple:
>
> $ wf-recorder --audio
>

Thanks for sharing!

> If you watch any of my below videos, you'll see me take breaks like, "Oh
> hold on just a second, I think my landlord is knocking at my front
> door. I'll be right back."

I think I saw one of them a while back. I'll try
watching more of them :)

-- 
Bonface M. K. (https://www.bonfacemunyoki.com)
Chief Emacs Mchochezi / Twitter: @BonfaceKilz
GPG key = D4F09EB110177E03C28E2FE1F5BBAE1E0392253F

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Re: Removing/replacing “Guix in action” video from the home page?

[Joshua Branson]

Well, I've created a basic guix package management video.  It's about 7
minutes long.  You'll notice I made it a little goofy.  Essentially
building the XDG mime database takes a while.  So I just read from
Stallman's essays during the downtime.

If someone wants to show me how to install packages without having to
wait so long for the xdg mime database to build, please let me know, and
I'll re-make the video.

https://video.hardlimit.com/videos/watch/c0dfb36a-a84b-4363-8b1b-17aeadd4aaaf

Thanks,

Joshua

--
Joshua Branson
Sent from Emacs and Gnus
https://gnucode.me
https://video.hardlimit.com/accounts/joshua_branson/video-channels
"You can have whatever you want, as long as you help enough other people get what they want." - Zig Ziglar

Re: Removing/replacing “Guix in action” video from the home page?

[Ludovic Courtès]

Hi,

Joshua Branson <jbranso@dismail.de> skribis:

> Well, I've created a basic guix package management video.  It's about 7
> minutes long.  You'll notice I made it a little goofy.  Essentially
> building the XDG mime database takes a while.  So I just read from
> Stallman's essays during the downtime.
>
> If someone wants to show me how to install packages without having to
> wait so long for the xdg mime database to build, please let me know, and
> I'll re-make the video.
>
> https://video.hardlimit.com/videos/watch/c0dfb36a-a84b-4363-8b1b-17aeadd4aaaf

Thanks!  I think 7 minutes is too long; IMO we should aim for ~1mn–1.5mn
at most as is currently the case.  Also full screen, large enough fonts,
no “guix pull” warnings, ‘--max-jobs=1’ on the daemon side to reduce
verbosity.  Slick and to-the-point!  :-)

Thinking about it, there are probably tools to replay commands in a
terminal such that we could automate all this, no?

Ludo’.

Re: Removing/replacing “Guix in action” video from the home page?

[zimoun]

Hi,

On Fri, 16 Oct 2020 at 12:28, Ludovic Courtès <ludo@gnu.org> wrote:

> > https://video.hardlimit.com/videos/watch/c0dfb36a-a84b-4363-8b1b-17aeadd4aaaf
>
> Thanks!  I think 7 minutes is too long; IMO we should aim for ~1mn–1.5mn
> at most as is currently the case.  Also full screen, large enough fonts,
> no “guix pull” warnings, ‘--max-jobs=1’ on the daemon side to reduce
> verbosity.  Slick and to-the-point!  :-)

The video is really long mainly because each command takes literally
ages.  Well the "XDG mine" step to be precise; maybe Joshua you have
something misconfigured.
And from my point of view, something without voice seems better.

All the best,
simon

Re: Removing/replacing “Guix in action” video from the home page?

[Luis Felipe]

‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Friday, October 16, 2020 10:36 AM, zimoun <zimon.toutoune@gmail.com> wrote:

> Hi,
>
> On Fri, 16 Oct 2020 at 12:28, Ludovic Courtès ludo@gnu.org wrote:
>
> > > https://video.hardlimit.com/videos/watch/c0dfb36a-a84b-4363-8b1b-17aeadd4aaaf
> >
> > Thanks! I think 7 minutes is too long; IMO we should aim for ~1mn–1.5mn
> > at most as is currently the case. Also full screen, large enough fonts,
> > no “guix pull” warnings, ‘--max-jobs=1’ on the daemon side to reduce
> > verbosity. Slick and to-the-point! :-)
>
> The video is really long mainly because each command takes literally
> ages. Well the "XDG mine" step to be precise; maybe Joshua you have
> something misconfigured.

If the slowness at the end can be avoided by configuring something, I'd like to know, because that slowness is always the case in my experience. For example, installing the program Joshua mentioned earlier, wf-recorder, which is quite small, took ~7 minutes in my computer (Intel® Core™ i3-8100 CPU @ 3.60GHz × 4, 4 GiB RAM, 1 TB HDD).

Also, in my case, it is common for guix commands to take long seconds to display any feedback when called. Actually, the current video shows guix working at a speed I've never experienced myself.

So I wonder if the video should include these inconveniences, which people will find once they install the software. I wouldn't like the video or anything in the website to feel like false, mainstream advertising.

Re: Removing/replacing “Guix in action” video from the home page?

[jbranso]

Ahh.  Thanks for reminding me!  I forgot about those "guix pull warnings".  
I have a local guix channel.  I can disable that for the video.  I will 
also add --max=jobs=1 to the daemon side for the video.

I do agree with you that the video is too long, because the XDG mime step 
takes some time to finish.  I wonder what I have mis-configured...I'm using 
Guix system on a Librebooted T400.  ext4.   

I can always remove the audio.  :)

I'll remake said video removing the guix pull errors, and maybe the commands
will not take so long to finish.

Thanks,

Joshua

October 16, 2020 6:36 AM, "zimoun" <zimon.toutoune@gmail.com> wrote:

> Hi,
> 
> On Fri, 16 Oct 2020 at 12:28, Ludovic Courtès <ludo@gnu.org> wrote:
> 
>> https://video.hardlimit.com/videos/watch/c0dfb36a-a84b-4363-8b1b-17aeadd4aaaf
>> 
>> Thanks! I think 7 minutes is too long; IMO we should aim for ~1mn–1.5mn
>> at most as is currently the case. Also full screen, large enough fonts,
>> no “guix pull” warnings, ‘--max-jobs=1’ on the daemon side to reduce
>> verbosity. Slick and to-the-point! :-)
> 
> The video is really long mainly because each command takes literally
> ages. Well the "XDG mine" step to be precise; maybe Joshua you have
> something misconfigured.
> And from my point of view, something without voice seems better.
> 
> All the best,
> simon

Re: Removing/replacing “Guix in action” video from the home page?

[jbranso]

I do share Luis' sentiments that perhaps the video should mention that the 
install commands may take some time to complete, but in the interest of brevity,
we can always cut those bits out of the video.

Do you know what that means!?  I get to learn video editing!  SILLY SALTY 
SALAMANDERS THAT'S AWESOME!  :)

Do ya'll have any video editors that you'd recommend?

October 16, 2020 11:27 AM, "Luis Felipe" <luis.felipe.la@protonmail.com> wrote:

> ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
> On Friday, October 16, 2020 10:36 AM, zimoun <zimon.toutoune@gmail.com> wrote:
> 
>> Hi,
>> 
>> On Fri, 16 Oct 2020 at 12:28, Ludovic Courtès ludo@gnu.org wrote:
>> 
>>> https://video.hardlimit.com/videos/watch/c0dfb36a-a84b-4363-8b1b-17aeadd4aaaf
>> 
>> Thanks! I think 7 minutes is too long; IMO we should aim for ~1mn–1.5mn
>> at most as is currently the case. Also full screen, large enough fonts,
>> no “guix pull” warnings, ‘--max-jobs=1’ on the daemon side to reduce
>> verbosity. Slick and to-the-point! :-)
>> 
>> The video is really long mainly because each command takes literally
>> ages. Well the "XDG mine" step to be precise; maybe Joshua you have
>> something misconfigured.
> 
> If the slowness at the end can be avoided by configuring something, I'd like to know, because that
> slowness is always the case in my experience. For example, installing the program Joshua mentioned
> earlier, wf-recorder, which is quite small, took ~7 minutes in my computer (Intel® Core™ i3-8100
> CPU @ 3.60GHz × 4, 4 GiB RAM, 1 TB HDD).
> 
> Also, in my case, it is common for guix commands to take long seconds to display any feedback when
> called. Actually, the current video shows guix working at a speed I've never experienced myself.
> 
> So I wonder if the video should include these inconveniences, which people will find once they
> install the software. I wouldn't like the video or anything in the website to feel like false,
> mainstream advertising.

Re: Removing/replacing “Guix in action” video from the home page?

[Luis Felipe]

‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Friday, October 16, 2020 8:00 PM, <jbranso@dismail.de> wrote:

> I do share Luis' sentiments that perhaps the video should mention that the
> install commands may take some time to complete, but in the interest of brevity,
> we can always cut those bits out of the video.
>
> Do you know what that means!? I get to learn video editing! SILLY SALTY
> SALAMANDERS THAT'S AWESOME! :)
>
> Do ya'll have any video editors that you'd recommend?


I heard Pitivi is good, but it is not packaged yet.

Re: Removing/replacing “Guix in action” video from the home page?

[Maxim Cournoyer]

Hello,

Luis Felipe <luis.felipe.la@protonmail.com> writes:

> ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
> On Friday, October 16, 2020 10:36 AM, zimoun <zimon.toutoune@gmail.com> wrote:
>
>> Hi,
>>
>> On Fri, 16 Oct 2020 at 12:28, Ludovic Courtès ludo@gnu.org wrote:
>>
>> > > https://video.hardlimit.com/videos/watch/c0dfb36a-a84b-4363-8b1b-17aeadd4aaaf
>> >
>> > Thanks! I think 7 minutes is too long; IMO we should aim for ~1mn–1.5mn
>> > at most as is currently the case. Also full screen, large enough fonts,
>> > no “guix pull” warnings, ‘--max-jobs=1’ on the daemon side to reduce
>> > verbosity. Slick and to-the-point! :-)
>>
>> The video is really long mainly because each command takes literally
>> ages. Well the "XDG mine" step to be precise; maybe Joshua you have
>> something misconfigured.

> If the slowness at the end can be avoided by configuring something,
> I'd like to know, because that slowness is always the case in my
> experience. For example, installing the program Joshua mentioned
> earlier, wf-recorder, which is quite small, took ~7 minutes in my
> computer (Intel® Core™ i3-8100 CPU @ 3.60GHz × 4, 4 GiB RAM, 1 TB
> HDD).

I also experience poor performance on profile generation when using Guix
on an older machine equipped with spinning disks.  This kind of
operation appears to be IO hungry, and performs much faster on solid
state drives (SSDs).

I've opened an issue for the poor performance on spinning drives here:
https://issues.guix.gnu.org/44053.

Thanks,

Maxim

Re: Removing/replacing “Guix in action” video from the home page?

[zimoun]

Dear,

On Sun, 18 Oct 2020 at 05:42, Maxim Cournoyer <maxim.cournoyer@gmail.com> wrote:

> I also experience poor performance on profile generation when using Guix
> on an older machine equipped with spinning disks.  This kind of
> operation appears to be IO hungry, and performs much faster on solid
> state drives (SSDs).
>
> I've opened an issue for the poor performance on spinning drives here:
> https://issues.guix.gnu.org/44053.

I am the first who complains about slowness (see patches for "guix
search" :-)).  However, I am not able to reproduce even on an older
machine equipped with spinning disks because it depends on the number
of packages living in the profiles.  Therefore, the trick is to split
all the big profiles into smaller ones.  See for reference:
<https://guix.gnu.org/cookbook/en/html_node/Guix-Profiles-in-Practice.html#Guix-Profiles-in-Practice>.


All the best,
simon

Re: Removing/replacing “Guix in action” video from the home page?

[Joshua Branson]

I don't want to complain (because I'm probably not going to be able to
fix any issues that I spot), but it does seem to take a while for me to
install packages, at least the XDG mime step.  It's not a huge issue for
me.  I just realize that installing packages takes more time . :)  But
if we are calling this an "issue", your suggestion to use numerous
packages seems like a "work-around" rather than a "fix".

Again, I'm not complaining.  I'm just offering my thoughts.

--
Joshua Branson
Sent from Emacs and Gnus
https://gnucode.me
https://video.hardlimit.com/accounts/joshua_branson/video-channels
"You can have whatever you want, as long as you help enough other people get what they want." - Zig Ziglar

‘xdg-mime-database’ profile hook is slow

[Ludovic Courtès]

Hi,

Joshua Branson <jbranso@dismail.de> skribis:

> I don't want to complain (because I'm probably not going to be able to
> fix any issues that I spot), but it does seem to take a while for me to
> install packages, at least the XDG mime step.  It's not a huge issue for
> me.  I just realize that installing packages takes more time . :)  But
> if we are calling this an "issue", your suggestion to use numerous
> packages seems like a "work-around" rather than a "fix".

Just having identified which part is low is already a step forward.  :-)
I hadn’t noticed, but indeed the “XDG MIME database” steps takes a
while.  For my “big” user profile, on an SSD, it takes more than 4s:

--8<---------------cut here---------------start------------->8---
$ time guix build --check $(guix gc -R $(guix gc --derivers $(readlink -f ~/.guix-profile)) |grep xdg-mime-database.drv)
The following profile hook will be built:
   /gnu/store/dhcv26m2k3kyx92wf9palp8byhblgjrr-xdg-mime-database.drv
building XDG MIME database...
successfully built /gnu/store/dhcv26m2k3kyx92wf9palp8byhblgjrr-xdg-mime-database.drv
/gnu/store/q25yv8hil0281x7zm25l259xvjfwwrsx-xdg-mime-database

real    0m4.241s
user    0m1.689s
sys     0m0.101s
$ guix package -I |wc -l
296
--8<---------------cut here---------------end--------------->8---

It’s worse on a cold cache:

--8<---------------cut here---------------start------------->8---
$ drv="$(guix gc -R $(guix gc --derivers $(readlink -f ~/.guix-profile)) |grep xdg-mime-database.drv)"
$ sudo sh -c 'echo 3 > /proc/sys/vm/drop_caches'
$ time guix build --check "$drv"
The following profile hook will be built:
   /gnu/store/dhcv26m2k3kyx92wf9palp8byhblgjrr-xdg-mime-database.drv
building XDG MIME database...
successfully built /gnu/store/dhcv26m2k3kyx92wf9palp8byhblgjrr-xdg-mime-database.drv
/gnu/store/q25yv8hil0281x7zm25l259xvjfwwrsx-xdg-mime-database

real    0m5.872s
user    0m0.314s
sys     0m0.102s
--8<---------------cut here---------------end--------------->8---

And it’s probably worse on spinning disks?  What timings do you get?

We should profile this hook and see if it’s the ‘union-build’ call
that’s taking time or the ‘update-mime-database’ invocation.
‘union-build’ tends to be very I/O-intensive.

Thanks,
Ludo’.

Re: ‘xdg-mime-database’ profile hook is slow

[zimoun]

Hi Ludo,

On Wed, 21 Oct 2020 at 11:49, Ludovic Courtès <ludo@gnu.org> wrote:

> It’s worse on a cold cache:

Well, a lot of Guix operations are really slow on cold cache. ;-)


> And it’s probably worse on spinning disks?  What timings do you get?

Some timings are provided by bug report #44053 which tracks the issue.

    <http://issues.guix.gnu.org/issue/44053>


Cheers,
simon

bug#44053: ‘xdg-mime-database’ profile hook is slow

[Joshua Branson via Bug reports for GNU Guix]

I am just posting my performance numbers.  Hopefully you all find it helpful.
I am running Guix System on a Lenovo Thinkpad T400 with 8GB on a hard drive.

#+BEGIN_SRC sh :results output :exports both
guix describe
#+END_SRC

#+RESULTS:
#+begin_example
Generation 49	Oct 20 2020 01:15:33	(current)
  my-personal-packages 547d900
    repository URL: https://notabug.org/jbranso/guix-packages.git
    branch: master
    commit: 547d900c25d2bb9490946162e0fcb315d6bace68
  guix 93c2518
    repository URL: https://git.savannah.gnu.org/git/guix.git
    branch: master
    commit: 93c251818dcd2bf5f60f42e595504293ee83371a

GUIX_PACKAGE_PATH="/home/joshua/prog/gnu/guix/guix-packages/"
#+end_example

The "XDG MIME database" takes a while.

#+BEGIN_SRC sh :results output :exports both
time guix build --check $(guix gc -R $(guix gc --derivers $(readlink -f ~/.guix-profile)) |grep xdg-mime-database.drv)
#+END_SRC

#+RESULTS:
: The following profile hook will be built:
:    /gnu/store/lmhklgdscbfp5c6gl81skyz0azfg156m-xdg-mime-database.drv
: building XDG MIME database...
: successfully built /gnu/store/lmhklgdscbfp5c6gl81skyz0azfg156m-xdg-mime-database.drv
: successfully built /gnu/store/lmhklgdscbfp5c6gl81skyz0azfg156m-xdg-mime-database.drv
: /gnu/store/x8q8g9l0jhrpmjjm3xsh3ib1z8l79cyx-xdg-mime-database
:
: real	0m43.716s
: user	0m3.626s
: sys	0m0.258s

Cold cache:

#+BEGIN_SRC sh :results output :exports both
drv="$(guix gc -R $(guix gc --derivers $(readlink -f ~/.guix-profile)) |grep xdg-mime-database.drv)"
sudo sh -c 'echo 3 > /proc/sys/vm/drop_caches'

time guix build --check "$drv"
#+END_SRC

#+RESULTS:
: The following profile hook will be built:
:    /gnu/store/lmhklgdscbfp5c6gl81skyz0azfg156m-xdg-mime-database.drv
: building XDG MIME database...
: successfully built /gnu/store/lmhklgdscbfp5c6gl81skyz0azfg156m-xdg-mime-database.drv
: successfully built /gnu/store/lmhklgdscbfp5c6gl81skyz0azfg156m-xdg-mime-database.drv
: /gnu/store/x8q8g9l0jhrpmjjm3xsh3ib1z8l79cyx-xdg-mime-database
:
: real	1m29.606s
: user	0m1.401s
: sys	0m0.238s

I have 64 packages in my profile.

#+BEGIN_SRC sh :results output :exports both
guix package -I | wc --lines
#+END_SRC

#+RESULTS:
: 64

If you want to see all packages:

#+BEGIN_SRC sh :results output :exports both
guix package -I
#+END_SRC

#+RESULTS:
#+begin_example
guile-colorized	0.1	out	/gnu/store/5h0jfssgyx49cq82wrmw57an7ngb7kkz-guile-colorized-0.1
font-hack	3.003	out	/gnu/store/52r8anazd4rnkq9m3vxk700jga5h0i74-font-hack-3.003
font-dejavu	2.37	out	/gnu/store/7y3lvk3xf4im8n44337mc6y0ccysvfia-font-dejavu-2.37
font-adobe-source-code-pro	2.030R-ro-1.050R-it	out	/gnu/store/l5m74158njcan3p784gqhkir6zyk0bcp-font-adobe-source-code-pro-2.030R-ro-1.050R-it
sicp	20170703-1.225c172	out	/gnu/store/x2safq6fvcbhp2rljny89qiq74y1xd13-sicp-20170703-1.225c172
unzip	6.0	out	/gnu/store/1zx8knb7h79q6cr4kwhbz6z6v609309w-unzip-6.0
font-google-noto	20171025	out	/gnu/store/g2szydnbvs7qqy2nf7qylba0rapajmd8-font-google-noto-20171025
font-awesome	4.7.0	out	/gnu/store/gknn01i1nr80apmcx42w36cqcz3zzri2-font-awesome-4.7.0
texinfo	6.7	out	/gnu/store/w8k9hcigvhzrlrblv8lgqj77sm3833rs-texinfo-6.7
gcc-toolchain	10.2.0	out	/gnu/store/pknm43xsza6nlc7bn27djip8fis92akd-gcc-toolchain-10.2.0
recutils	1.8	out	/gnu/store/qlx179h9mfdv4zywx2ias2jmkygvs834-recutils-1.8
guile-readline	3.0.2	out	/gnu/store/va6l1ivclww22fi38w5h99pb4ndn99hg-guile-readline-3.0.2
gtypist	2.9.5	out	/gnu/store/03wd707lyz49f2r14cm9ybyzh7vfvi0j-gtypist-2.9.5
scsh	0.0.0-1.1144324	out	/gnu/store/57frd08q6gyd7ysq3aqwlxxmify3w53h-scsh-0.0.0-1.1144324
make	4.3	out	/gnu/store/4k33n2nhsnnaxk2ip75gj7xiqdjns5hq-make-4.3
isync	1.3.3	out	/gnu/store/745qmx9mmnwq0j3zrd50qcdd2bgv5clz-isync-1.3.3
jmacs	27.1	out	/gnu/store/0hqdddkvhi2acxjdssdi5as3wj6cgvnz-jmacs-27.1
glibc-locales	2.31	out	/gnu/store/x9c4dk4zc9mi5j9hm3lq1q539kkdhkln-glibc-locales-2.31
guile	3.0.4	out	/gnu/store/ah16zr8mmfkqy23rr7jy5a842ca1q9h1-guile-3.0.4
guile-json	4.3.2	out	/gnu/store/12y1s0p3585ydf336gq85kjh5217pnzp-guile-json-4.3.2
guile-syntax-highlight	0.1	out	/gnu/store/dwjqscckpypqfq38hc97x5ipc9fplpp9-guile-syntax-highlight-0.1
haunt	0.2.4	out	/gnu/store/ccvqa9a6yclgkpi9izhpgf1vgjaghqvr-haunt-0.2.4
gnutls	3.6.14	out	/gnu/store/0f6agk6xk8rcz99907d39nd1vzmc4abq-gnutls-3.6.14
wget	1.20.3	out	/gnu/store/d7b16jqrgb1jz65hl7vnz261dbxmjh3s-wget-1.20.3
gnupg	2.2.23	out	/gnu/store/89cjqnar4aacg58wl6cm1h41rym9mv4l-gnupg-2.2.23
sassc	3.6.1	out	/gnu/store/6pqn2i0r12ypss13mdvsypskkcpaagji-sassc-3.6.1
qterminal	0.15.0	out	/gnu/store/y7qrfa78y785xfajb3gvvhwcm2d02l81-qterminal-0.15.0
dmenu	5.0	out	/gnu/store/393frjc5xjaab6nvp3wxpajb1rc6gynr-dmenu-5.0
openssh	8.4p1	out	/gnu/store/k8lnv9cqk6m15k18hhzg7w696r1vxx1v-openssh-8.4p1
grim	1.3.1	out	/gnu/store/9v5i9q7kwcmq1q31qri0icjkhh3csh9r-grim-1.3.1
evince	3.36.5	out	/gnu/store/arwvpbrzsch4w6afkpqln6625dfl0bz8-evince-3.36.5
pulseaudio	13.0	out	/gnu/store/19wcjfwdr3hzq1a4wcpld1zdrjichck0-pulseaudio-13.0
libreoffice	6.4.6.2	out	/gnu/store/7rbk52nzqmakd5whds5a6f07xrd2k870-libreoffice-6.4.6.2
termite	15	out	/gnu/store/8lqfy0mxqnq3xg24gwsxvzpxnvv6firh-termite-15
mpv	0.32.0	out	/gnu/store/2i2gzn7fa8qq0f1jkqhiyl0xw63fjr4w-mpv-0.32.0
pinentry	1.1.0	out	/gnu/store/bdsk9yq48lx1f7y7xr9sv4yrmm4ync9b-pinentry-1.1.0
glib	2.62.6	doc	/gnu/store/ql2226knbh4q04bbdiqcppvs5rjyl3ga-glib-2.62.6-doc
pidgin	2.13.0	out	/gnu/store/fd06njmc5maid7b474v224iazy7bc20h-pidgin-2.13.0
gimp	2.10.20	out	/gnu/store/m397hvwhsd0l6v5d0vqxxkm4iyp0p9w3-gimp-2.10.20
sway	1.4	out	/gnu/store/27ggd92in0hpgmkgk79n2iy4angjxwvl-sway-1.4
wf-recorder	0.2.1	out	/gnu/store/glc6y75l4czpfyrgbrbgxg38ig004v1p-wf-recorder-0.2.1
wofi	1.1.2	out	/gnu/store/qaylx0k6wg3awsamn2rqr41q9c8iwypg-wofi-1.1.2
linphoneqt	4.1.1	out	/gnu/store/wlcviacpagxqnw1737x131if0fj7kzjv-linphoneqt-4.1.1
qbittorrent	4.2.5	out	/gnu/store/29cjbdmz809pdvmylbx307l2p7zv0ma9-qbittorrent-4.2.5
pavucontrol	4.0	out	/gnu/store/0ilm4lncr6gpg4h3zdvaxg1pibkm6934-pavucontrol-4.0
git	2.28.0	send-email	/gnu/store/g5x559qk5yxs19jcxqplqv8b9y32vak2-git-2.28.0-send-email
flatpak	1.8.2	out	/gnu/store/ywfsnccvlr0j6afb5vnl3z4ismvcfbz6-flatpak-1.8.2
xdg-desktop-portal	1.7.2	out	/gnu/store/jkjx5dd7s3dp58p2hwsm8n2rm15z90ys-xdg-desktop-portal-1.7.2
xdg-desktop-portal-gtk	1.7.1	out	/gnu/store/zhssisyp66vggjnqi5y8nb1xnk55vnw1-xdg-desktop-portal-gtk-1.7.1
xeyes	1.1.2	out	/gnu/store/4jx8i19xd94d421n4acy2c1p0nn9h6d0-xeyes-1.1.2
emacs-polymode	0.2	out	/gnu/store/gmm1y1xahg44yw9ghsf0kwd40w86q7mf-emacs-polymode-0.2
notmuch	0.31	out	/gnu/store/0js5dwj8nxj0x0hxfllgzz4zxlsmyrz4-notmuch-0.31
msmtp	1.8.12	out	/gnu/store/s1g4nskvnsx9ww0032xg23548h7mnwvq-msmtp-1.8.12
youtube-viewer	3.7.9	out	/gnu/store/jm7q53lpda3a4rs2z7xv7cgig7adpncb-youtube-viewer-3.7.9
guile-curl	0.6	out	/gnu/store/9nnclxjxakwx9yc381arqrk1nhld21b5-guile-curl-0.6
qemu	5.1.0	out	/gnu/store/qzi36f60d2zlrdj9mg6b5y4i00w1fzfq-qemu-5.1.0
icecat	78.3.1-guix0-preview1	out	/gnu/store/71fkykdajhkshsvzwrnqm4lsc6qgycg2-icecat-78.3.1-guix0-preview1
git	2.28.0	out	/gnu/store/j66k3x1wz0bc6nh09dwa6i4jwahqcabi-git-2.28.0
guix	1.1.0-29.4e3ed9b	out	/gnu/store/irirj169rncank4y7i6n8qyiiqbs76qr-guix-1.1.0-29.4e3ed9b
ffmpeg	4.3.1	out	/gnu/store/sg4yq9i0v1lphvs1vx33dw9mn801adrd-ffmpeg-4.3.1
pavucontrol-qt	0.15.0	out	/gnu/store/9d0zp4wps5kpbqsl4yvjb96spb5xwz9b-pavucontrol-qt-0.15.0
clementine	1.3.1-2.4619a4c	out	/gnu/store/5392fysgmmi2jmn98maz9ihzn9ahzhw9-clementine-1.3.1-2.4619a4c
mako	1.4	out	/gnu/store/k83v9wz6szf6k2p2sz1amvwqm687j3h2-mako-1.4
ungoogled-chromium	86.0.4240.75-0.c34a56d	out	/gnu/store/m0s9mrbirbssis5nn9agx8k4sl2ck0y9-ungoogled-chromium-86.0.4240.75-0.c34a56d
#+end_example


Thanks,

--
Joshua Branson
Sent from Emacs and Gnus
https://gnucode.me
https://video.hardlimit.com/accounts/joshua_branson/video-channels
"You can have whatever you want, as long as you help enough other people get what they want." - Zig Ziglar

Re: ‘xdg-mime-database’ profile hook is slow

[Joshua Branson]

I am just posting my performance numbers.  Hopefully you all find it helpful.
I am running Guix System on a Lenovo Thinkpad T400 with 8GB on a hard drive.

#+BEGIN_SRC sh :results output :exports both
guix describe
#+END_SRC

#+RESULTS:
#+begin_example
Generation 49	Oct 20 2020 01:15:33	(current)
  my-personal-packages 547d900
    repository URL: https://notabug.org/jbranso/guix-packages.git
    branch: master
    commit: 547d900c25d2bb9490946162e0fcb315d6bace68
  guix 93c2518
    repository URL: https://git.savannah.gnu.org/git/guix.git
    branch: master
    commit: 93c251818dcd2bf5f60f42e595504293ee83371a

GUIX_PACKAGE_PATH="/home/joshua/prog/gnu/guix/guix-packages/"
#+end_example

The "XDG MIME database" takes a while.

#+BEGIN_SRC sh :results output :exports both
time guix build --check $(guix gc -R $(guix gc --derivers $(readlink -f ~/.guix-profile)) |grep xdg-mime-database.drv)
#+END_SRC

#+RESULTS:
: The following profile hook will be built:
:    /gnu/store/lmhklgdscbfp5c6gl81skyz0azfg156m-xdg-mime-database.drv
: building XDG MIME database...
: successfully built /gnu/store/lmhklgdscbfp5c6gl81skyz0azfg156m-xdg-mime-database.drv
: successfully built /gnu/store/lmhklgdscbfp5c6gl81skyz0azfg156m-xdg-mime-database.drv
: /gnu/store/x8q8g9l0jhrpmjjm3xsh3ib1z8l79cyx-xdg-mime-database
:
: real	0m43.716s
: user	0m3.626s
: sys	0m0.258s

Cold cache:

#+BEGIN_SRC sh :results output :exports both
drv="$(guix gc -R $(guix gc --derivers $(readlink -f ~/.guix-profile)) |grep xdg-mime-database.drv)"
sudo sh -c 'echo 3 > /proc/sys/vm/drop_caches'

time guix build --check "$drv"
#+END_SRC

#+RESULTS:
: The following profile hook will be built:
:    /gnu/store/lmhklgdscbfp5c6gl81skyz0azfg156m-xdg-mime-database.drv
: building XDG MIME database...
: successfully built /gnu/store/lmhklgdscbfp5c6gl81skyz0azfg156m-xdg-mime-database.drv
: successfully built /gnu/store/lmhklgdscbfp5c6gl81skyz0azfg156m-xdg-mime-database.drv
: /gnu/store/x8q8g9l0jhrpmjjm3xsh3ib1z8l79cyx-xdg-mime-database
:
: real	1m29.606s
: user	0m1.401s
: sys	0m0.238s

I have 64 packages in my profile.

#+BEGIN_SRC sh :results output :exports both
guix package -I | wc --lines
#+END_SRC

#+RESULTS:
: 64

If you want to see all packages:

#+BEGIN_SRC sh :results output :exports both
guix package -I
#+END_SRC

#+RESULTS:
#+begin_example
guile-colorized	0.1	out	/gnu/store/5h0jfssgyx49cq82wrmw57an7ngb7kkz-guile-colorized-0.1
font-hack	3.003	out	/gnu/store/52r8anazd4rnkq9m3vxk700jga5h0i74-font-hack-3.003
font-dejavu	2.37	out	/gnu/store/7y3lvk3xf4im8n44337mc6y0ccysvfia-font-dejavu-2.37
font-adobe-source-code-pro	2.030R-ro-1.050R-it	out	/gnu/store/l5m74158njcan3p784gqhkir6zyk0bcp-font-adobe-source-code-pro-2.030R-ro-1.050R-it
sicp	20170703-1.225c172	out	/gnu/store/x2safq6fvcbhp2rljny89qiq74y1xd13-sicp-20170703-1.225c172
unzip	6.0	out	/gnu/store/1zx8knb7h79q6cr4kwhbz6z6v609309w-unzip-6.0
font-google-noto	20171025	out	/gnu/store/g2szydnbvs7qqy2nf7qylba0rapajmd8-font-google-noto-20171025
font-awesome	4.7.0	out	/gnu/store/gknn01i1nr80apmcx42w36cqcz3zzri2-font-awesome-4.7.0
texinfo	6.7	out	/gnu/store/w8k9hcigvhzrlrblv8lgqj77sm3833rs-texinfo-6.7
gcc-toolchain	10.2.0	out	/gnu/store/pknm43xsza6nlc7bn27djip8fis92akd-gcc-toolchain-10.2.0
recutils	1.8	out	/gnu/store/qlx179h9mfdv4zywx2ias2jmkygvs834-recutils-1.8
guile-readline	3.0.2	out	/gnu/store/va6l1ivclww22fi38w5h99pb4ndn99hg-guile-readline-3.0.2
gtypist	2.9.5	out	/gnu/store/03wd707lyz49f2r14cm9ybyzh7vfvi0j-gtypist-2.9.5
scsh	0.0.0-1.1144324	out	/gnu/store/57frd08q6gyd7ysq3aqwlxxmify3w53h-scsh-0.0.0-1.1144324
make	4.3	out	/gnu/store/4k33n2nhsnnaxk2ip75gj7xiqdjns5hq-make-4.3
isync	1.3.3	out	/gnu/store/745qmx9mmnwq0j3zrd50qcdd2bgv5clz-isync-1.3.3
jmacs	27.1	out	/gnu/store/0hqdddkvhi2acxjdssdi5as3wj6cgvnz-jmacs-27.1
glibc-locales	2.31	out	/gnu/store/x9c4dk4zc9mi5j9hm3lq1q539kkdhkln-glibc-locales-2.31
guile	3.0.4	out	/gnu/store/ah16zr8mmfkqy23rr7jy5a842ca1q9h1-guile-3.0.4
guile-json	4.3.2	out	/gnu/store/12y1s0p3585ydf336gq85kjh5217pnzp-guile-json-4.3.2
guile-syntax-highlight	0.1	out	/gnu/store/dwjqscckpypqfq38hc97x5ipc9fplpp9-guile-syntax-highlight-0.1
haunt	0.2.4	out	/gnu/store/ccvqa9a6yclgkpi9izhpgf1vgjaghqvr-haunt-0.2.4
gnutls	3.6.14	out	/gnu/store/0f6agk6xk8rcz99907d39nd1vzmc4abq-gnutls-3.6.14
wget	1.20.3	out	/gnu/store/d7b16jqrgb1jz65hl7vnz261dbxmjh3s-wget-1.20.3
gnupg	2.2.23	out	/gnu/store/89cjqnar4aacg58wl6cm1h41rym9mv4l-gnupg-2.2.23
sassc	3.6.1	out	/gnu/store/6pqn2i0r12ypss13mdvsypskkcpaagji-sassc-3.6.1
qterminal	0.15.0	out	/gnu/store/y7qrfa78y785xfajb3gvvhwcm2d02l81-qterminal-0.15.0
dmenu	5.0	out	/gnu/store/393frjc5xjaab6nvp3wxpajb1rc6gynr-dmenu-5.0
openssh	8.4p1	out	/gnu/store/k8lnv9cqk6m15k18hhzg7w696r1vxx1v-openssh-8.4p1
grim	1.3.1	out	/gnu/store/9v5i9q7kwcmq1q31qri0icjkhh3csh9r-grim-1.3.1
evince	3.36.5	out	/gnu/store/arwvpbrzsch4w6afkpqln6625dfl0bz8-evince-3.36.5
pulseaudio	13.0	out	/gnu/store/19wcjfwdr3hzq1a4wcpld1zdrjichck0-pulseaudio-13.0
libreoffice	6.4.6.2	out	/gnu/store/7rbk52nzqmakd5whds5a6f07xrd2k870-libreoffice-6.4.6.2
termite	15	out	/gnu/store/8lqfy0mxqnq3xg24gwsxvzpxnvv6firh-termite-15
mpv	0.32.0	out	/gnu/store/2i2gzn7fa8qq0f1jkqhiyl0xw63fjr4w-mpv-0.32.0
pinentry	1.1.0	out	/gnu/store/bdsk9yq48lx1f7y7xr9sv4yrmm4ync9b-pinentry-1.1.0
glib	2.62.6	doc	/gnu/store/ql2226knbh4q04bbdiqcppvs5rjyl3ga-glib-2.62.6-doc
pidgin	2.13.0	out	/gnu/store/fd06njmc5maid7b474v224iazy7bc20h-pidgin-2.13.0
gimp	2.10.20	out	/gnu/store/m397hvwhsd0l6v5d0vqxxkm4iyp0p9w3-gimp-2.10.20
sway	1.4	out	/gnu/store/27ggd92in0hpgmkgk79n2iy4angjxwvl-sway-1.4
wf-recorder	0.2.1	out	/gnu/store/glc6y75l4czpfyrgbrbgxg38ig004v1p-wf-recorder-0.2.1
wofi	1.1.2	out	/gnu/store/qaylx0k6wg3awsamn2rqr41q9c8iwypg-wofi-1.1.2
linphoneqt	4.1.1	out	/gnu/store/wlcviacpagxqnw1737x131if0fj7kzjv-linphoneqt-4.1.1
qbittorrent	4.2.5	out	/gnu/store/29cjbdmz809pdvmylbx307l2p7zv0ma9-qbittorrent-4.2.5
pavucontrol	4.0	out	/gnu/store/0ilm4lncr6gpg4h3zdvaxg1pibkm6934-pavucontrol-4.0
git	2.28.0	send-email	/gnu/store/g5x559qk5yxs19jcxqplqv8b9y32vak2-git-2.28.0-send-email
flatpak	1.8.2	out	/gnu/store/ywfsnccvlr0j6afb5vnl3z4ismvcfbz6-flatpak-1.8.2
xdg-desktop-portal	1.7.2	out	/gnu/store/jkjx5dd7s3dp58p2hwsm8n2rm15z90ys-xdg-desktop-portal-1.7.2
xdg-desktop-portal-gtk	1.7.1	out	/gnu/store/zhssisyp66vggjnqi5y8nb1xnk55vnw1-xdg-desktop-portal-gtk-1.7.1
xeyes	1.1.2	out	/gnu/store/4jx8i19xd94d421n4acy2c1p0nn9h6d0-xeyes-1.1.2
emacs-polymode	0.2	out	/gnu/store/gmm1y1xahg44yw9ghsf0kwd40w86q7mf-emacs-polymode-0.2
notmuch	0.31	out	/gnu/store/0js5dwj8nxj0x0hxfllgzz4zxlsmyrz4-notmuch-0.31
msmtp	1.8.12	out	/gnu/store/s1g4nskvnsx9ww0032xg23548h7mnwvq-msmtp-1.8.12
youtube-viewer	3.7.9	out	/gnu/store/jm7q53lpda3a4rs2z7xv7cgig7adpncb-youtube-viewer-3.7.9
guile-curl	0.6	out	/gnu/store/9nnclxjxakwx9yc381arqrk1nhld21b5-guile-curl-0.6
qemu	5.1.0	out	/gnu/store/qzi36f60d2zlrdj9mg6b5y4i00w1fzfq-qemu-5.1.0
icecat	78.3.1-guix0-preview1	out	/gnu/store/71fkykdajhkshsvzwrnqm4lsc6qgycg2-icecat-78.3.1-guix0-preview1
git	2.28.0	out	/gnu/store/j66k3x1wz0bc6nh09dwa6i4jwahqcabi-git-2.28.0
guix	1.1.0-29.4e3ed9b	out	/gnu/store/irirj169rncank4y7i6n8qyiiqbs76qr-guix-1.1.0-29.4e3ed9b
ffmpeg	4.3.1	out	/gnu/store/sg4yq9i0v1lphvs1vx33dw9mn801adrd-ffmpeg-4.3.1
pavucontrol-qt	0.15.0	out	/gnu/store/9d0zp4wps5kpbqsl4yvjb96spb5xwz9b-pavucontrol-qt-0.15.0
clementine	1.3.1-2.4619a4c	out	/gnu/store/5392fysgmmi2jmn98maz9ihzn9ahzhw9-clementine-1.3.1-2.4619a4c
mako	1.4	out	/gnu/store/k83v9wz6szf6k2p2sz1amvwqm687j3h2-mako-1.4
ungoogled-chromium	86.0.4240.75-0.c34a56d	out	/gnu/store/m0s9mrbirbssis5nn9agx8k4sl2ck0y9-ungoogled-chromium-86.0.4240.75-0.c34a56d
#+end_example


Thanks,

--
Joshua Branson
Sent from Emacs and Gnus
https://gnucode.me
https://video.hardlimit.com/accounts/joshua_branson/video-channels
"You can have whatever you want, as long as you help enough other people get what they want." - Zig Ziglar

Re: Removing/replacing “Guix in action” video from the home page?

[Joshua Branson]

So I've spent an hour today making a new video.  It's about 10 minutes
long.  I'll cut out some bits of it via video editors.  Just an update.

Thanks,

Joshua

--
Joshua Branson
Sent from Emacs and Gnus
https://gnucode.me
https://video.hardlimit.com/accounts/joshua_branson/video-channels
"You can have whatever you want, as long as you help enough other people get what they want." - Zig Ziglar

Re: Removing/replacing “Guix in action” video from the home page?

[Tobias Geerinckx-Rice]

[-- Attachment #1: Type: text/plain, Size: 336 bytes --]

Joshua Branson 写道：
> So I've spent an hour today making a new video.  It's about 10 
> minutes
> long.

Thank you!

> I'll cut out some bits of it via video editors.

I can't recommend one myself but I've heard good things in general 
of Kdenlive & OpenShot.  Both in Guix.  Probably working.

Kind regards,

T G-R

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 247 bytes --]

Re: Removing/replacing “Guix in action” video from the home page?

[jbranso]

I've got a two minute video now.  How's this one?

https://video.hardlimit.com/videos/watch/5d2cd193-4734-44c4-9455-1778e084a130

October 28, 2020 8:59 AM, "Tobias Geerinckx-Rice" <me@tobias.gr> wrote:

> Joshua Branson 写道：
> 
>> So I've spent an hour today making a new video. It's about 10
>> minutes
>> long.
> 
> Thank you!
> 
>> I'll cut out some bits of it via video editors.
> 
> I can't recommend one myself but I've heard good things in general
> of Kdenlive & OpenShot. Both in Guix. Probably working.
> 
> Kind regards,
> 
> T G-R

Re: ‘xdg-mime-database’ profile hook is slow

[Luis Felipe]

‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Tuesday, October 27, 2020 11:14 PM, Joshua Branson <jbranso@dismail.de> wrote:

[...]

>
> #+BEGIN_SRC sh :results output :exports both
> time guix build --check $(guix gc -R $(guix gc --derivers $(readlink -f ~/.guix-profile)) |grep xdg-mime-database.drv)
> #+END_SRC


I haven't run this command because I don't know what it does (how will it affect my profile?), but if you think the results from this command would be more useful than what I posted to issue #44053, please let me know and I'll run it.

Re: ‘xdg-mime-database’ profile hook is slow

[zimoun]

Dear,

On Wed, 28 Oct 2020 at 21:48, Luis Felipe <luis.felipe.la@protonmail.com> wrote:

>> #+BEGIN_SRC sh :results output :exports both
>> time guix build --check $(guix gc -R $(guix gc --derivers $(readlink -f ~/.guix-profile)) |grep xdg-mime-database.drv)
>> #+END_SRC
>
> I haven't run this command because I don't know what it does (how will
> it affect my profile?), but if you think the results from this command
> would be more useful than what I posted to issue #44053, please let me
> know and I'll run it.

The command will not affect your profile.

1. Get the real file of all the symlinks forest

        $ readlink -f ~/.guix-profile
        /gnu/store/z32aid8bjbz7ylwbjfh5x6lbg2g7fiv0-profile

2. Get the derivation that generated this file

        $ guix gc --derivers /gnu/store/z32aid8bjbz7ylwbjfh5x6lbg2g7fiv0-profile
        /gnu/store/wnjk3zsrw6s55hqj0qbbwhx635i5s6n0-profile.drv

3. Get all that it is used by the previous derivation

        $ guix gc -R /gnu/store/wnjk3zsrw6s55hqj0qbbwhx635i5s6n0-profile.drv
        /gnu/store/z41v36kbd8xa1l2ga2lsaa287yyk7wdb-nasm-2.14.02-guile-builder
        /gnu/store/ich43zbavdqphzshfr5q5d00arissxa7-nasm-2.14.02.tar.xz.drv
        /gnu/store/0rifkf1snq6fjz7l4dpg5j3i2wgj7gxp-nasm-2.14.02.drv

        [...] a **lot** of items

        /gnu/store/3x2kak8abb6z2klch72kfff2qxzv00pj-libpng-1.6.37
        /gnu/store/3qrm6z400hh66x1kxd4zrbnkkylwcvg8-ca-certificate-bundle.drv
        /gnu/store/2jlwri28aycsayql85rfphrks721ny1k-xdg-mime-database.drv
        /gnu/store/1i57pf9q71sm7gpqkh15h677794y61dz-profile-builder
        /gnu/store/0llx3y194278l5ksr4xh9kc64mh8nn8d-nss-certs-3.52.1
        /gnu/store/wnjk3zsrw6s55hqj0qbbwhx635i5s6n0-profile.drv

4. Get only the one you are interested in

        $ guix gc -R /gnu/store/wnjk3zsrw6s55hqj0qbbwhx635i5s6n0-profile.drv | grep xdg-mime-database.drv
        /gnu/store/2jlwri28aycsayql85rfphrks721ny1k-xdg-mime-database.drv

5. Build again this derivation (--check)

        $ time guix build --check /gnu/store/2jlwri28aycsayql85rfphrks721ny1k-xdg-mime-database.drv
        The following profile hook will be built:
           /gnu/store/2jlwri28aycsayql85rfphrks721ny1k-xdg-mime-database.drv
        building XDG MIME database...
        successfully built /gnu/store/2jlwri28aycsayql85rfphrks721ny1k-xdg-mime-database.drv
        /gnu/store/hrcj1h0hl9f6hm1akh682zj1mhpwbx4c-xdg-mime-database

        real	0m3.493s
        user	0m0.435s
        sys	0m0.066s

Does it make sense?

Well from my POV, the information is #44053 is enough for now. :-)


All the best,
simon

Re: ‘xdg-mime-database’ profile hook is slow

[Luis Felipe]

‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Wednesday, October 28, 2020 10:38 PM, zimoun <zimon.toutoune@gmail.com> wrote:

[...]

>     Does it make sense?

It makes more sense now, thank you zimoun :)


>     Well from my POV, the information is #44053 is enough for now. :-)

Ok.

Re: Removing/replacing “Guix in action” video from the home page?

[Ludovic Courtès]

Hi Joshua,

jbranso@dismail.de skribis:

> I've got a two minute video now.  How's this one?
>
> https://video.hardlimit.com/videos/watch/5d2cd193-4734-44c4-9455-1778e084a130

Thanks again for taking the time!  I like this one better.  It still has
slightly annoying artifacts like --max-jobs > 1, starting from a
non-empty profile, details like that.

But really, I think we should find a way to script that (including the
typing) so we can record the actual output of the command, and have a
reproducible way to redo it.

WDYT?

Thanks,
Ludo’.

Re: Removing/replacing “Guix in action” video from the home page?

[jbranso]

I'm ok with that.  I guess I'm not certain how to go about scripting this sort of thing.  :(

October 31, 2020 5:56 PM, "Ludovic Courtès" <ludo@gnu.org> wrote:

> Hi Joshua,
> 
> jbranso@dismail.de skribis:
> 
>> I've got a two minute video now. How's this one?
>> 
>> https://video.hardlimit.com/videos/watch/5d2cd193-4734-44c4-9455-1778e084a130
> 
> Thanks again for taking the time! I like this one better. It still has
> slightly annoying artifacts like --max-jobs > 1, starting from a
> non-empty profile, details like that.
> 
> But really, I think we should find a way to script that (including the
> typing) so we can record the actual output of the command, and have a
> reproducible way to redo it.
> 
> WDYT?
> 
> Thanks,
> Ludo’.

bug#44053: ‘xdg-mime-database’ profile hook is slow

[Ludovic Courtès]

Hi,

Joshua Branson <jbranso@dismail.de> skribis:

> The "XDG MIME database" takes a while.
>
> #+BEGIN_SRC sh :results output :exports both
> time guix build --check $(guix gc -R $(guix gc --derivers $(readlink -f ~/.guix-profile)) |grep xdg-mime-database.drv)
> #+END_SRC
>
>
> #+RESULTS:
> : The following profile hook will be built:
> :    /gnu/store/lmhklgdscbfp5c6gl81skyz0azfg156m-xdg-mime-database.drv
> : building XDG MIME database...
> : successfully built /gnu/store/lmhklgdscbfp5c6gl81skyz0azfg156m-xdg-mime-database.drv
> : successfully built /gnu/store/lmhklgdscbfp5c6gl81skyz0azfg156m-xdg-mime-database.drv
> : /gnu/store/x8q8g9l0jhrpmjjm3xsh3ib1z8l79cyx-xdg-mime-database
> :
> : real	0m43.716s
> : user	0m3.626s
> : sys	0m0.258s

I found that the MIME database is computed only over the subset of the
packages in your profile that provide ‘share/mime/packages’, plus
‘shared-mime-info’.

In my profile, only LibreOffice provides that directory, so the union is
made over these two directories and that’s what ‘update-mime-database’
works on.

Apart from LibreOffice, I found that ‘share/mime/packages’ is provided
by at least: hugin, gcr, fontforge.  Most GUI packages don’t have it.
So in practice, we’re often rebuilding the exact same database.

Here’s the time taken by ‘update-mime-database’ alone:

--8<---------------cut here---------------start------------->8---
ludo@ribbon ~$ mkdir -p /tmp/mime/share/mime/packages
ludo@ribbon ~$ cd /tmp/mime/share/mime/packages
ludo@ribbon /tmp/mime/share/mime/packages$ for i in $(guix build libreoffice ^C
ludo@ribbon /tmp/mime/share/mime/packages$ for i in ~/.guix-profile/share/mime/packages/* ; do ln -s $i ; done
ludo@ribbon /tmp/mime/share/mime/packages$ ls -l
totalo 8
lrwxrwxrwx 1 ludo users 64 Nov  2 11:46 freedesktop.org.xml -> /home/ludo/.guix-profile/share/mime/packages/freedesktop.org.xml
lrwxrwxrwx 1 ludo users 60 Nov  2 11:46 libreoffice.xml -> /home/ludo/.guix-profile/share/mime/packages/libreoffice.xml
ludo@ribbon /tmp/mime/share/mime/packages$ cd /tmp/mime/
ludo@ribbon /tmp/mime$ time update-mime-database -V /tmp/mime/share/mime
Updating MIME database in /tmp/mime/share/mime...

Parsing source file /tmp/mime/share/mime/packages/freedesktop.org.xml...
Parsing source file /tmp/mime/share/mime/packages/libreoffice.xml...
Wrote 1124 strings at 2c - 6310
Wrote aliases at 6310 - 6be4
Wrote parents at 6be4 - 8468
Wrote literal globs at 8468 - 855c
Wrote suffix globs at 855c - 13514
Wrote full globs at 13514 - 13554
Wrote magic at 13554 - 2065c
Wrote namespace list at 2065c - 20798
Wrote icons list at 20798 - 2079c
Wrote generic icons list at 2079c - 213b8
Wrote types list at 213b8 - 22020

Note that '/tmp/mime/share' is not in the search path
set by the XDG_DATA_HOME and XDG_DATA_DIRS
environment variables, so applications may not
be able to find it until you set them. The
directories currently searched are:

- /home/ludo/.local/share
- /home/ludo/.guix-profile/share
- /run/current-system/profile/share
- /home/ludo/.guix-profile/share
- /run/current-system/profile/share


real    0m2.166s
user    0m0.278s
sys     0m0.056s
--8<---------------cut here---------------end--------------->8---

To be compared with:

--8<---------------cut here---------------start------------->8---
$ drv="$(guix gc -R $(guix gc --derivers $(readlink -f ~/.guix-profile)) |grep xdg-mime-database.drv)"
$ time guix build --check $drv
The following profile hook will be built:
   /gnu/store/jrmwsxpz3wmq37zx29lvb0r9nvcmdviz-xdg-mime-database.drv
building XDG MIME database...
successfully built /gnu/store/jrmwsxpz3wmq37zx29lvb0r9nvcmdviz-xdg-mime-database.drv
/gnu/store/npvj2sr9kxx48znh7zc8zmzwzs6brc90-xdg-mime-database

real    0m3.670s
user    0m1.428s
sys     0m0.029s
--8<---------------cut here---------------end--------------->8---

Thus, the build time itself is entirely taken by ‘update-mime-database’
(the 1.4s above is “overhead” in ‘guix build’ it would seem).

Ludo’.

Re: bug#44053: ‘xdg-mime-database’ profile hook is slow

[Ludovic Courtès]

Ludovic Courtès <ludo@gnu.org> skribis:

> Apart from LibreOffice, I found that ‘share/mime/packages’ is provided
> by at least: hugin, gcr, fontforge.  Most GUI packages don’t have it.
> So in practice, we’re often rebuilding the exact same database.

On closer inspection, the time-consuming bit is processing
‘share/mime/packages/freedesktop.org.xml’ (from ‘shared-mime-info’),
which is quite large and leads to the creation of hundreds of file.  We
end up re-processing it every time.  This is particularly wasteful
because the ‘shared-mime-info’ package already contains the result of
applying ‘update-mime-database’ to itself.

Unfortunately, AIUI,

  update-mime-database(X ∪ Y) ≠ update-mime-database(X) ∪ update-mime-database(Y)

(For example, the files
‘share/mime/{globs,magic,XMLnamespaces,subclasses,aliases,types,generic-icons,icons,treemagic,mime.cache}’
concatenate info from X and Y.)

So it would seem we cannot simply used the pre-built database from
‘shared-mime-info’ and merge it with that of the other packages, at
least not without changing ‘update-mime-database’ or re-implementing
parts of it on our side.

Ludo’.

Re: bug#44053: ‘xdg-mime-database’ profile hook is slow

[Ludovic Courtès]

Ludovic Courtès <ludo@gnu.org> skribis:

> Ludovic Courtès <ludo@gnu.org> skribis:
>
>> Apart from LibreOffice, I found that ‘share/mime/packages’ is provided
>> by at least: hugin, gcr, fontforge.  Most GUI packages don’t have it.
>> So in practice, we’re often rebuilding the exact same database.
>
> On closer inspection, the time-consuming bit is processing
> ‘share/mime/packages/freedesktop.org.xml’ (from ‘shared-mime-info’),
> which is quite large and leads to the creation of hundreds of file.  We
> end up re-processing it every time.  This is particularly wasteful
> because the ‘shared-mime-info’ package already contains the result of
> applying ‘update-mime-database’ to itself.

Based on these observations, I added a fast path to the
‘xdg-mime-database’ hook:

  https://git.savannah.gnu.org/cgit/guix.git/commit/?id=76ea70bd70aeb76570445c11cea2f98139192b54

It’s down to 0s in the common case where the profile doesn’t contain any
packages providing ‘share/mime/packages’.

Ludo’.

Re: Removing/replacing “Guix in action” video from the home page?

[zimoun]

Dear,

Thank you for working on this.

On Sun, 01 Nov 2020 at 00:50, jbranso@dismail.de wrote:
> October 31, 2020 5:56 PM, "Ludovic Courtès" <ludo@gnu.org> wrote:
>>> I've got a two minute video now. How's this one?
>>> 
>>> https://video.hardlimit.com/videos/watch/5d2cd193-4734-44c4-9455-1778e084a130
>> 
>> Thanks again for taking the time! I like this one better. It still has
>> slightly annoying artifacts like --max-jobs > 1, starting from a
>> non-empty profile, details like that.
>> 
>> But really, I think we should find a way to script that (including the
>> typing) so we can record the actual output of the command, and have a
>> reproducible way to redo it.
>
> I'm ok with that.  I guess I'm not certain how to go about scripting this sort of thing.  :(

Maybe, the generation of this video could use scripts from there:

   https://git.savannah.gnu.org/cgit/guix/videos.git/tree/

or even maybe be included.


WDYT?

All the best,
simon

Re: bug#44053: ‘xdg-mime-database’ profile hook is slow

[zimoun]

Hi,

>   https://git.savannah.gnu.org/cgit/guix.git/commit/?id=76ea70bd70aeb76570445c11cea2f98139192b54

Clever workaround!  What are now the performances on previous examples
(same profiles and same packages)?


> Unfortunately, AIUI,
>
>   update-mime-database(X ∪ Y) ≠ update-mime-database(X) ∪ update-mime-database(Y)

Hum?  Interesting… well weird!  If it is not a “morphism” then it is not
really an updater.  Anyway.

I am curious about the comparison:

   time(update-mime-database(X ∪ Y))
vs
   time(update-mime-database(X)) + time(update-mime-database(Y))
vs
   time(update-mime-database(X ∩ Y))


> So it would seem we cannot simply used the pre-built database from
> ‘shared-mime-info’ and merge it with that of the other packages, at
> least not without changing ‘update-mime-database’ or re-implementing
> parts of it on our side.

’shared-mime-info’ is simply a package, right?  So what does it means:
«Find a way to avoid reprocessing 'shared-mime-info'» in:

--8<---------------cut here---------------start------------->8---
                 ;; the database.  TODO: Find a way to avoid reprocessing
                 ;; 'shared-mime-info', which is the most expensive one.
[...]
                 (invoke #+(file-append shared-mime-info
                                        "/bin/update-mime-database")
                         destdir)))))))
--8<---------------cut here---------------end--------------->8---

?  Well, I miss why and how ’shared-mime-info’ could be the culprit here
or what could be improved with “shared-mime-info”?  Maybe replace the
“lazy reference” by a strict one if it makes sense.


All the best,
simon

Re: bug#44053: ‘xdg-mime-database’ profile hook is slow

[Luis Felipe]

‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Tuesday, November 3, 2020 11:32 PM, zimoun <zimon.toutoune@gmail.com> wrote:

> Hi,
>
> > https://git.savannah.gnu.org/cgit/guix.git/commit/?id=76ea70bd70aeb76570445c11cea2f98139192b54
>
> Clever workaround! What are now the performances on previous examples
> (same profiles and same packages)?

In my case there seem to be no improvement (using Guix 5e7cf66fb35780f930ad0bc5fe21ac330df4411d).


$ time guix package -i perl --max-jobs=1
Se instalará el siguiente paquete:
   perl 5.30.2

Se construirá la siguiente derivación:
   /gnu/store/48imlmfi2hjmp4ksyidvy99c31ahj44z-profile.drv

Se descargarán 0,6 MB
construyendo empaquetado de certificados de CA...
descargando de https://ci.guix.gnu.org/nar/lzip/j3f5hx6yvhlj3sapiipigkwg05b49nwn-freetype-2.10.4 ...
 freetype-2.10.4  555KiB                                       707KiB/s 00:01 [##################] 100.0%

injertando 5 paquetes en /gnu/store/s4s7xzswar962p9w1nvf0hfcgmnxyfsh-at-spi2-core-2.34.0.drv ...
injertando 1 paquete en /gnu/store/80n340f7bnba0ivp00z10a32rz8g8wsx-fontconfig-2.13.1.drv ...
injertando 4 paquetes en /gnu/store/hm3a895l251mckzb9bhiglcwfb6xli5n-at-spi2-atk-2.34.1.drv ...
injertando 6 paquetes en /gnu/store/9vwl8s2h7rbfhvimsarzc1q4gnclwpk2-cairo-1.16.0.drv ...
injertando 6 paquetes en /gnu/store/k6gajkzfq4drpcrimbwxk1ls0h7z1nzw-cairo-1.16.0.drv ...
injertando 4 paquetes en /gnu/store/klq5sp427s80d0mhz3b5x48xpmhf3ila-gdk-pixbuf-2.40.0.drv ...
injertando 5 paquetes en /gnu/store/ijkpcwanfpj02i0rxk4ys0kfdpj6sz69-ghostscript-with-cups-9.52.drv ...
generando la caché de esquemas de GLib...
injertando 2 paquetes en /gnu/store/kg8ca3wz01ibhbm5wk707r44jjnrxdg1-harfbuzz-2.6.4.drv ...
construyendo el directorio de manuales Info...
injertando 4 paquetes en /gnu/store/97bgi57qs077pcqggvr7di0vhchlshk2-libxft-2.3.3.drv ...
construyendo la base de datos de páginas de manual...
injertando 1 paquete en /gnu/store/gb85hxzczf4m0crzwqpw2imxpr1d67nx-mkfontscale-1.2.1.drv ...
injertando 9 paquetes en /gnu/store/ddiqkw9r0p1lhvqmdlcyrzf8v900pm4r-pango-1.42.4.drv ...
injertando 1 paquete en /gnu/store/xd0ca96gvh3vn9bp3bcmczczcxm0bynd-mkfontdir-1.0.7.drv ...
injertando 11 paquetes en /gnu/store/s53s5qx304b90l0dp734lqi42whwd0vd-librsvg-2.40.21.drv ...
construyendo el directorio de tipografías...
injertando 5 paquetes en /gnu/store/qg628jlnjmiyv964c0i4s7bbkwy32c6c-gdk-pixbuf+svg-2.40.0.drv ...
injertando 8 paquetes en /gnu/store/1mj8cjf43nqd9r5151lqrf1sdd1sjg16-pango-1.44.7.drv ...
injertando 8 paquetes en /gnu/store/d42vnhn9grcsyiibdgkiryqb7rxhb89j-poppler-0.86.1.drv ...
construyendo la caché de ficheros desktop XDG...
injertando 12 paquetes en /gnu/store/anknpdyhmfirw3rz2k9zm9kiyak8yy1s-cups-filters-1.27.4.drv ...
construyendo la base de datos MIME XDG...
injertando 3 paquetes en /gnu/store/xgny7xbl635g8na8x03x4cdr7abiphiw-cups-2.3.3.drv ...
injertando 20 paquetes en /gnu/store/yhjl68x7kcjbv40v823x4hl8rvv8l50b-gtk+-2.24.32.drv ...
injertando 21 paquetes en /gnu/store/kq37fnw8335f1hqc3j4hhqqcdnhl371p-gtk+-3.24.20.drv ...
creando la caché de temas de iconos de GTK+...
construyendo los ficheros de caché para los métodos de entrada de GTK+...
construyendo perfil con 86 paquetes...


real	8m38,121s
user	0m2,742s
sys	0m0,338s

Re: bug#44053: ‘xdg-mime-database’ profile hook is slow

[zimoun]

Hi,

On Thu, 05 Nov 2020 at 14:47, Luis Felipe <luis.felipe.la@protonmail.com> wrote:

>> Clever workaround! What are now the performances on previous examples
>> (same profiles and same packages)?
>
> In my case there seem to be no improvement (using Guix 5e7cf66fb35780f930ad0bc5fe21ac330df4411d).
>
>
> $ time guix package -i perl --max-jobs=1

[...]

> real	8m38,121s
> user	0m2,742s
> sys	0m0,338s

Thanks.  But it is hard to conclude because the previous timing is
missing.  The right experiment should be:

--8<---------------cut here---------------start------------->8---
old=c73496f433044a76003b33c3855bb35ecd0df87f
new=5e7cf66fb35780f930ad0bc5fe21ac330df4411d
guix time-machine --commit=$old -- help
guix time-machine --commit=$new -- help

drv=$(guix gc -R $(guix gc --derivers $(readlink -f ~/.guix-profile)) |grep xdg-mime-database.drv)

guix package -I |wc -l
time guix time-machine --commit=$old -- build --check $drv
time guix time-machine --commit=$new -- build --check $drv
--8<---------------cut here---------------end--------------->8---


And personally, I get:

18

Updating channel 'guix' from Git repository at 'https://git.savannah.gnu.org/git/guix.git'...
The following profile hook will be built:
   /gnu/store/2jlwri28aycsayql85rfphrks721ny1k-xdg-mime-database.drv
building XDG MIME database...
successfully built /gnu/store/2jlwri28aycsayql85rfphrks721ny1k-xdg-mime-database.drv
/gnu/store/hrcj1h0hl9f6hm1akh682zj1mhpwbx4c-xdg-mime-database

real	0m8.063s
user	0m6.226s
sys	0m0.282s

Updating channel 'guix' from Git repository at 'https://git.savannah.gnu.org/git/guix.git'...
The following profile hook will be built:
   /gnu/store/2jlwri28aycsayql85rfphrks721ny1k-xdg-mime-database.drv
building XDG MIME database...
successfully built /gnu/store/2jlwri28aycsayql85rfphrks721ny1k-xdg-mime-database.drv
/gnu/store/hrcj1h0hl9f6hm1akh682zj1mhpwbx4c-xdg-mime-database

real	0m8.016s
user	0m6.223s
sys	0m0.243s

Well, I have only 18 packages in my ~/.guix-profile.  That’s why the
difference is not visible and the “time-machine” is totally dominating
here.


All the best,
simon

Re: bug#44053: ‘xdg-mime-database’ profile hook is slow

[Luis Felipe]

‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Thursday, November 5, 2020 4:10 PM, zimoun <zimon.toutoune@gmail.com> wrote:

> Hi,
>
> On Thu, 05 Nov 2020 at 14:47, Luis Felipe luis.felipe.la@protonmail.com wrote:
>
> > > Clever workaround! What are now the performances on previous examples
> > > (same profiles and same packages)?
> >
> > In my case there seem to be no improvement (using Guix 5e7cf66fb35780f930ad0bc5fe21ac330df4411d).
> > $ time guix package -i perl --max-jobs=1
>
> [...]
>
> > real 8m38,121s
> > user 0m2,742s
> > sys 0m0,338s
>
> Thanks. But it is hard to conclude because the previous timing is
> missing.

I don't understand, I posted my original timing in https://issues.guix.gnu.org/44053#1 .



> The right experiment should be:
>
> --8<---------------cut here---------------start------------->8---
> old=c73496f433044a76003b33c3855bb35ecd0df87f
> new=5e7cf66fb35780f930ad0bc5fe21ac330df4411d
> guix time-machine --commit=$old -- help
> guix time-machine --commit=$new -- help
>
> drv=$(guix gc -R $(guix gc --derivers $(readlink -f ~/.guix-profile)) |grep xdg-mime-database.drv)
>
> guix package -I |wc -l
> time guix time-machine --commit=$old -- build --check $drv
> time guix time-machine --commit=$new -- build --check $drv
> --8<---------------cut here---------------end--------------->8---


I get this:

yo@gnu: ~❯ guix package -I |wc -l
85

yo@gnu: ~❯ time guix time-machine --commit=$old -- build --check $drv
Actualizando el canal 'guix' del repositorio Git en 'https://git.savannah.gnu.org/git/guix.git'...
Actualizando el canal 'luflac-x' del repositorio Git en 'git@gitlab.com:luis-felipe/guix-channel-x.git'...
Se construirá la siguiente extensión del perfil:
   /gnu/store/8hswzn212w7wqlr7cgsvq5v7zjh62chc-xdg-mime-database.drv
construyendo la base de datos MIME XDG...
/gnu/store/8hswzn212w7wqlr7cgsvq5v7zjh62chc-xdg-mime-database.drv construido satisfactoriamente
/gnu/store/i4qslq2517pwkwb5dyivrg8idsjd8n11-xdg-mime-database

real	0m56,245s
user	0m4,324s
sys	0m0,218s


yo@gnu: ~❯ time guix time-machine --commit=$new -- build --check $drv
Actualizando el canal 'guix' del repositorio Git en 'https://git.savannah.gnu.org/git/guix.git'...
Actualizando el canal 'luflac-x' del repositorio Git en 'git@gitlab.com:luis-felipe/guix-channel-x.git'...
Se construirá la siguiente extensión del perfil:
   /gnu/store/8hswzn212w7wqlr7cgsvq5v7zjh62chc-xdg-mime-database.drv
construyendo la base de datos MIME XDG...
/gnu/store/8hswzn212w7wqlr7cgsvq5v7zjh62chc-xdg-mime-database.drv construido satisfactoriamente
/gnu/store/i4qslq2517pwkwb5dyivrg8idsjd8n11-xdg-mime-database

real	0m43,272s
user	0m4,214s
sys	0m0,200s

bug#44053: ‘xdg-mime-database’ profile hook is slow

[Ludovic Courtès]

Hi,

Luis Felipe <luis.felipe.la@protonmail.com> skribis:

> ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
> On Tuesday, November 3, 2020 11:32 PM, zimoun <zimon.toutoune@gmail.com> wrote:
>
>> Hi,
>>
>> > https://git.savannah.gnu.org/cgit/guix.git/commit/?id=76ea70bd70aeb76570445c11cea2f98139192b54
>>
>> Clever workaround! What are now the performances on previous examples
>> (same profiles and same packages)?
>
> In my case there seem to be no improvement (using Guix 5e7cf66fb35780f930ad0bc5fe21ac330df4411d).

Please note that the change above addresses only one specific source of
slowness, the ‘xdg-mime-database’ hook, and only in specific cases.

It’s good to look at the overall timing of ‘guix install’, because
that’s what matters in the end, but as we work on optimizing it, we have
to look at specific aspects of it.

> $ time guix package -i perl --max-jobs=1

[...]

> injertando 12 paquetes en /gnu/store/anknpdyhmfirw3rz2k9zm9kiyak8yy1s-cups-filters-1.27.4.drv ...
> construyendo la base de datos MIME XDG...
> injertando 3 paquetes en /gnu/store/xgny7xbl635g8na8x03x4cdr7abiphiw-cups-2.3.3.drv ...
> injertando 20 paquetes en /gnu/store/yhjl68x7kcjbv40v823x4hl8rvv8l50b-gtk+-2.24.32.drv ...
> injertando 21 paquetes en /gnu/store/kq37fnw8335f1hqc3j4hhqqcdnhl371p-gtk+-3.24.20.drv ...
> creando la caché de temas de iconos de GTK+...
> construyendo los ficheros de caché para los métodos de entrada de GTK+...
> construyendo perfil con 86 paquetes...
>
>
> real	8m38,121s
> user	0m2,742s
> sys	0m0,338s

Here it’s likely that grafting is what’s taking the most time on a
spinning disk.

We should hack (guix status) so it can optionally prefix each event with
a timestamp.

As far as ‘xdg-mime-database’ is concerned, it should be down to 0s,
unless your profile contains one of the packages I cited (libreoffice,
gcr, hugin, etc.).

Thanks,
Ludo’.

Re: bug#44053: ‘xdg-mime-database’ profile hook is slow

[Ludovic Courtès]

Hello,

zimoun <zimon.toutoune@gmail.com> skribis:

>> So it would seem we cannot simply used the pre-built database from
>> ‘shared-mime-info’ and merge it with that of the other packages, at
>> least not without changing ‘update-mime-database’ or re-implementing
>> parts of it on our side.
>
> ’shared-mime-info’ is simply a package, right?  So what does it means:
> «Find a way to avoid reprocessing 'shared-mime-info'» in:
>
>                  ;; the database.  TODO: Find a way to avoid reprocessing
>                  ;; 'shared-mime-info', which is the most expensive one.
> [...]
>                  (invoke #+(file-append shared-mime-info
>                                         "/bin/update-mime-database")
>                          destdir)))))))

‘shared-mime-info’ contains ‘share/mime/freedesktop.org.xml’, which is
by far where ‘update-mime-database’ spends most of its time.

But it’s wasteful because ‘shared-mime-info’ already contains the result
of running ‘update-mime-database’ on itself.

HTH!

Ludo’.

Re: bug#44053: ‘xdg-mime-database’ profile hook is slow

[zimoun]

Hi,

On Thu, 05 Nov 2020 at 17:59, Luis Felipe <luis.felipe.la@protonmail.com> wrote:

Therefore, it is nice improvement! :-)

> real	0m56,245s
> user	0m4,324s
> sys	0m0,218s

> real	0m43,272s
> user	0m4,214s
> sys	0m0,200s

Because, I bet that most of the time is spent in the “time-machine”
part.  I mean, compare with:

 time guix time-machine --commit=$new -- help


All the best,
simon

Re: bug#44053: ‘xdg-mime-database’ profile hook is slow

[Luis Felipe]

‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Friday, November 6, 2020 9:10 AM, Ludovic Courtès <ludo@gnu.org> wrote:

> Hi,
>
> Luis Felipe luis.felipe.la@protonmail.com skribis:
>
> > ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
> > On Tuesday, November 3, 2020 11:32 PM, zimoun zimon.toutoune@gmail.com wrote:
> >
> > > Hi,
> > >
> > > > https://git.savannah.gnu.org/cgit/guix.git/commit/?id=76ea70bd70aeb76570445c11cea2f98139192b54
> > >
> > > Clever workaround! What are now the performances on previous examples
> > > (same profiles and same packages)?
> >
> > In my case there seem to be no improvement (using Guix 5e7cf66fb35780f930ad0bc5fe21ac330df4411d).
>
> Please note that the change above addresses only one specific source of
> slowness, the ‘xdg-mime-database’ hook, and only in specific cases.
>
> It’s good to look at the overall timing of ‘guix install’, because
> that’s what matters in the end, but as we work on optimizing it, we have
> to look at specific aspects of it.
>
> > $ time guix package -i perl --max-jobs=1


Yeah, sorry I was more focused on the general issue (#44053), but I understand.


> [...]
>
> > injertando 12 paquetes en /gnu/store/anknpdyhmfirw3rz2k9zm9kiyak8yy1s-cups-filters-1.27.4.drv ...
> > construyendo la base de datos MIME XDG...
> > injertando 3 paquetes en /gnu/store/xgny7xbl635g8na8x03x4cdr7abiphiw-cups-2.3.3.drv ...
> > injertando 20 paquetes en /gnu/store/yhjl68x7kcjbv40v823x4hl8rvv8l50b-gtk+-2.24.32.drv ...
> > injertando 21 paquetes en /gnu/store/kq37fnw8335f1hqc3j4hhqqcdnhl371p-gtk+-3.24.20.drv ...
> > creando la caché de temas de iconos de GTK+...
> > construyendo los ficheros de caché para los métodos de entrada de GTK+...
> > construyendo perfil con 86 paquetes...
> > real 8m38,121s
> > user 0m2,742s
> > sys 0m0,338s
>
> Here it’s likely that grafting is what’s taking the most time on a
> spinning disk.

It does take some time, but since I can see the output change from grafting to grafting, I at least can tell guix is doing something, so I just let it be.

Compared to grafting, the last step "construyendo perfil con X paquetes..." ("building profile with X packages..."), just stays there without change for several minutes, so it actually seems slower to me. Initially, I thought that guix had frozen.

Also, even though, the "building profile" step has a throbber (| / - \) to indicate that something is being done, it frequently stops in one of the frames of the sequence and stays there until the end.


> We should hack (guix status) so it can optionally prefix each event with
> a timestamp.
>
> As far as ‘xdg-mime-database’ is concerned, it should be down to 0s,
> unless your profile contains one of the packages I cited (libreoffice,
> gcr, hugin, etc.).

Yes, I have Libreoffice installed.

Re: bug#44053: ‘xdg-mime-database’ profile hook is slow

[Ludovic Courtès]

Hi,

Luis Felipe <luis.felipe.la@protonmail.com> skribis:

> Compared to grafting, the last step "construyendo perfil con X paquetes..." ("building profile with X packages..."), just stays there without change for several minutes, so it actually seems slower to me. Initially, I thought that guix had frozen.
>
> Also, even though, the "building profile" step has a throbber (| / - \) to indicate that something is being done, it frequently stops in one of the frames of the sequence and stays there until the end.

Interesting, so we should profile that step and see what can be done.  I
suspect it’s I/O-bound, but maybe we can at least improve feedback.

Thanks,
Ludo’.