<div dir="ltr">I think this is something that should be looked into, this cycle. We really nned faster startup for apps :)</div><div class="gmail_extra"> <div class="gmail_quote">On Mon, Jun 17, 2013 at 1:35 PM, Thomas Voß <<a href="mailto:thomas.voss@canonical.com" target="_blank">thomas.voss@canonical.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="im">On Mon, Jun 17, 2013 at 10:02 AM, Michael Zanetti <<a href="mailto:michael.zanetti@canonical.com">michael.zanetti@canonical.com</a>> wrote: > On Monday 17 June 2013 07:43:26 Thomas Voß wrote: >> thanks for bringing this up. Upstart user session will take care of >> single application instances and integrates with AppArmor to implement >> our confinement strategy (for >= saucy). The interesting feature from >> my pov is the accelerated application startup. Is that relying on >> preloading specific symbols? > > Yes, Its preloading all the Qt and libmeegotouch stuff. > > Basically instead of launching your app normally, you give it as an argument > to a the so called invoker (/usr/bin/invoker) which has all the common stuff > already loaded and forks to your application. </div>Ack, here is where the upstart-launcher would come into play. <div class="im"> > Additionally, they've introduced an own QApplication class with some better > tuned caching. Instead of creating a QApplication like you would do with > standard Qt, you use this > > QApplication *app = MDeclarativeCache::qApplication(argc, argv); > > to create a new QApplication. I don't exactly know the details what they do > inside that MDeclarativeCache. I guess one thing is to monitor the state of > the created QML view and make the splash screen go away when ready. > </div>This is something we would need to investigate further. Alberto, can you take a look at MDeclarativeCache and try to summarize the benefits it provides? Thanks, Thomas <div class="HOEnZb"><div class="h5"> > Hope this helps, > Michael > >> >> I'm CC'ing Ted and Steve explicitly on this mail as they are most >> familiar with upstart user session. >> >> Thanks, >> >> Thomas >> >> On Mon, Jun 17, 2013 at 7:33 AM, Alberto Mardegan >> >> <<a href="mailto:alberto.mardegan@canonical.com">alberto.mardegan@canonical.com</a>> wrote: >> > Hi all! >> > >> > I'm sending this message both to ubuntu-devel and ubuntu-phone, in the >> > >> > hope of reaching the widest interested audience as possible. However, >> > please reply to ubuntu-devel only. >> > >> > I want to bring to your attention the existence of a project which IMHO >> > would be very beneficial to Ubuntu (especially on embedded devices, but >> > not >> > only): the application launcher originally developed for Maemo/MeeGo. >> > >> > In short, the main features that applauncherd bring to the system are: >> > * faster application startup >> > * support for single instance applications >> > * splash screen while the application is starting up >> > >> > The recommended readings are these: >> > <a href="http://apidocs.meego.com/1.0/mtf/launcher.html" target="_blank">http://apidocs.meego.com/1.0/mtf/launcher.html</a> >> > <a href="http://goo.gl/DjGCV" target="_blank">http://goo.gl/DjGCV</a> >> > >> > In order to be used in Ubuntu, the software itself needs some porting, to >> > remove the dependencies to Qt4, X11, and the AEGIS security framework used >> > in MeeGo. Luckily though, these changes have already been made by the Mer >> > people, who ported the software to Qt5, removed the AEGIS stuff and also >> > simplified a bit the architecture (there isn't an applauncherd daemon any >> > more, but the invoked directly talks to the booster processes). They also >> > wrote a booster for speeding up the startup of applications using QML >> > components, and we could easily modify that to use our Ubuntu SDK >> > components instead. >> > >> > Their code is here: >> > <a href="https://github.com/nemomobile/mapplauncherd" target="_blank">https://github.com/nemomobile/mapplauncherd</a> >> > <a href="https://github.com/nemomobile/mapplauncherd-qt" target="_blank">https://github.com/nemomobile/mapplauncherd-qt</a> >> > <a href="https://github.com/nemomobile/mapplauncherd-booster-qtcomponents" target="_blank">https://github.com/nemomobile/mapplauncherd-booster-qtcomponents</a> >> > >> > Please let me know what you think of this. IMHO it's a simple and >> > brilliant >> > idea, it could be integrated with apparmor and also be used to provide >> > sane >> > default callbacks for handling the application lifetime state changes. >> > >> > I've never been directly involved in this project, but given how much I >> > dislike NIH, I'd be happy to collaborate with whoever wants to bring this >> > to Ubuntu. >> > >> > Ciao, >> > >> > Alberto >> > >> > -- >> > Mailing list: <a href="https://launchpad.net/~ubuntu-phone" target="_blank">https://launchpad.net/~ubuntu-phone</a> >> > Post to : <a href="mailto:ubuntu-phone@lists.launchpad.net">ubuntu-phone@lists.launchpad.net</a> >> > Unsubscribe : <a href="https://launchpad.net/~ubuntu-phone" target="_blank">https://launchpad.net/~ubuntu-phone</a> >> > More help : <a href="https://help.launchpad.net/ListHelp" target="_blank">https://help.launchpad.net/ListHelp</a> -- Mailing list: <a href="https://launchpad.net/~ubuntu-phone" target="_blank">https://launchpad.net/~ubuntu-phone</a> Post to : <a href="mailto:ubuntu-phone@lists.launchpad.net">ubuntu-phone@lists.launchpad.net</a> Unsubscribe : <a href="https://launchpad.net/~ubuntu-phone" target="_blank">https://launchpad.net/~ubuntu-phone</a> More help : <a href="https://help.launchpad.net/ListHelp" target="_blank">https://help.launchpad.net/ListHelp</a> </div></div></blockquote></div> </div>