9.1 Proposal: Top five performance problems

[Walter Bender]

For want it is worth, the team at the ministry of education in Peru
said that 8.2 feels faster to them. The aggregate user perception
vector is pointing in the right direction.

-walter

On Fri, Oct 24, 2008 at 1:58 PM, Tomeu Vizoso <tomeu at tomeuvizoso.net> wrote:
> On Fri, Oct 24, 2008 at 7:04 PM, Sayamindu Dasgupta <sayamindu at gmail.com> wrote:
>> On Fri, Oct 24, 2008 at 10:10 PM, Michael Stone <michael at laptop.org> wrote:
>>> Marco,
>>>
>>> I did some basic profiling of my new rainbow code last night and
>>> discovered that, in the best case with the current codebase on XO, it
>>> costs about 0.5s/"1 exec(python)". Approximately 80% of the 0.5s was
>>> spent importing modules.
>>>
>>> I hope to dig deeper in the near future, but I am concerned at my lack
>>> of inspiration about how to deal with this problem. (Other than by
>>> rewriting into a different language.) I still do not consider the
>>> mod_python approach used in the 767-era rainbow to be a viable long-term
>>> solution.
>>>
>>
>> FWIW, I had done some experiments with Federico's profiling scripts in
>> the early stages of the 8.2 cycle, and had got similar results:
>> http://dev.laptop.org/~sayamindu/not_so_prettygraph.png
>> It's not much meaningful, but if it helps in any way.. :-)
>> -sdg-
>
> Hmm, just did some measurements on a recent joyride image running a
> recent snapshot of sugar's HEAD and got this numbers:
>
> 1224870285                                                 Roughly
> when ck-xinit-session would be called
> 1224870288.762430 DEBUG root: STARTUP: Starting the shell
> 1224870297.765248 DEBUG root: STARTUP: Loading the desktop window
> 1224870297.777485 DEBUG root: STARTUP: Loading the home view
> 1224870297.780084 DEBUG root: STARTUP: Loading the favorites view
> 1224870297.793263 DEBUG root: STARTUP: Loading the activities list
> 1224870298.559094 DEBUG root: STARTUP: Loading the group view
> 1224870298.631829 DEBUG root: STARTUP: Loading the mesh view
> 1224870299.444656 DEBUG root: STARTUP: Loading the bundle registry
> 1224870301.935619 DEBUG root: STARTUP: --- uisetup_completed_cb ---
> 1224870301.979451 DEBUG root: STARTUP: --- uisetup_delayed_cb ---
> 1224870303.197090 DEBUG root: STARTUP: Loading the frame
> 1224870305.001450 DEBUG root: STARTUP: Loading the journal
>
> So that's 20 seconds that can (quite roughly) be compared to the 72
> seconds you got.
>
> I don't think we really got a 52 seconds improvement, but I'm pretty
> sure that Sugar already got quite leaner (measured 15MB of mem less
> after booting) and faster and there's still plenty of room for
> improvement.
>
> Cannot wait to have F10 joyride images to compare 8.2 to something
> closer to what will ship in 9.1 ;)
>
> Regards,
>
> Tomeu
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-- 
Walter Bender
Sugar Labs
http://www.sugarlabs.org