Re: Gnome keeps degrading every release.

[Vadim <vadim dbfin com>]

I can confirm the significant delays in animation starting from GS 3.6
on Ubuntu 12.10, and especially in GS 3.6.3 on Ubuntu 13.04.

These are some problems:

- Significant lag when Overview is open for the first time in GS 3.6. It
can take up to 20 (!) seconds. Second time and later it will open in
about 1 second or so. This did not happen in GS 3.4.

- Significant delays when switching using Alt+Tab in GS 3.6.3 on U13.04.
For example, using YAWL icons I can switch from Chrome to Files
(Nautilus) and back in about 1 second. Using Alt+Tab it takes more than
2 seconds to switch to Files from Chrome and more than 1 second to
switch back. Given that I press Alt+Tab and release immediately so that
Alt+Tab icons do NOT appear at all, this looks quite strange to me, and
is clearly GS lag. Moreover, switching this way raises CPU usage to 50%
(!) for about 1 second, and the more I use Alt+Tab, the more memory is
taken by Gnome-Shell, and the slower Alt+Tab becomes. This happens even
if I have all extensions turned off and restart Shell (kind of pure
Shell experience). This makes Alt+Tab almost unusable to me. I do not
care that much, because I have an alternative, but something clearly
wrong going on here.

- BTW, switching to Files takes longer for a reason: there are
significant problems with Files (Nautilus) 3.6.3, though it might not be
directly related to GS itself. For some reason the whole system freezes
for about half to a whole second when Files gets focus. This happens
when I switch to it from any other app, or when I switch to another
workspace that has Files focused. It looks like there is some kind of
extra work going on every time Files gets focus, and I do not know if it
is GS doing it (for example, remote menu) or Files doing itself. This
seems especially strange given that Files 3.6 has become a more basic
file manager compared to previous versions, yet noticeably slower than
it used to be. Even a simple folder change is significantly slower than
it used to be in Files 3.4. Once again, this is tested in clean GS
without any extensions, and did not happen in GS 3.4.

- Lags in animation. Sometimes the whole system would suddenly freeze
during animations, wait for several or sometimes even up to 10 or more
seconds, and then continue. This happens quite often, but on quite
irregular basis. One guess might be that it is Javascript garbage
collection working, but I have no clue if it is even close to the true
cause, I am just describing how it feels like.

Vadim.


On 07/17/2013 07:00 AM, gnome-shell-list-request gnome org wrote:
> Message: 1
> From: Alessandro Crismani <alessandro crismani gmail com>
>
> Finally, and this never happened before, sometimes animations happen 
> with a significant delay; let's say I press the Super key, then the 
> overview only appears after one second (maybe with a smooth transition, 
> but after a noticeable delay).
>
> Message: 2
> From: Milan Oravec <moravec ukf sk>
>
> Hi, I have very similar problems with animation lagging on GS 3.8.
>
> My distro is ubuntu 13.04 + gnome PPA + gnome staging PPA.
> Latest stable kernel self compiled + latest stable mesa &
> xf86-video-intel (SNA and UXA tested).
> My HW is Sony vaio z21xn (C2D 9600, GMA4500, 8GB RAM, Intel SSD) and
> Sony vaio SZ1XP (C2D 7200, GMA950, 3GB RAM, Intel SSD).
>
> Message: 3
> From: Rahul Jain <equites vero gmail com>
>
> Hi. I'm on AMD 880G chipset. Gigabyte GA-880GM-d2h, AMD 970 BE, Radeon HD
> 4250; running on free radeon driver on Ubuntu. Win 7 and Gnome 3.4.1 on
> Ubuntu 12.04 LTS are both multi-booted and are working splendidly. Right now on Ubuntu
> 13.04 with Gnome 3.8 via the Ubuntu Gnome 3 team PPA. But v 3.6 and 3.8
> have been tested on other distros too like ROSA and Fedora, and they all
> have the problem. Thanks.
>
>
> On Tue, Jul 16, 2013 at 9:00 PM, Jasper St. Pierre <jstpierre mecheye net>wrote:
>
> > We are very concerned with the performance of gnome-shell across all
> > devices. Unfortunately, given the large range of PC combinations that can
> > be built, it's hard to ensure that we're always improving.
> >
> > What CPU, GPU, and driver are you using? Additionally, since it might help
> > in testing, what distribution are you using, and do you have any special
> > tweaks that we might need to test with?