I'm sure that errors regarding OpenGL and QML will go away in a couple of months, let the Ubuntu team fix them.
2013/7/15 leon lee <[email protected]> > In fact, QML is not so handy. For example, how to fix the following issue: > Cant find EGLConfig, returning null config > > > ------------------ Original ------------------ > *From: * "Luke Bryan"<[email protected]>; > *Date: * Mon, Jul 15, 2013 01:09 PM > *To: * "[email protected]"<[email protected]>; > ** > *Subject: * Re: [Ubuntu-phone] Memory question > > Thanks for the info! That's an interesting article on Javascript and > performance. It seems low memory of mobiles, and better performance, are > the reason Ubuntu will be going with mostly Qt/c++ for mobile apps? I'm > more of a fan of Python/Java programming, but I can see why this may be > beneficial. I hope Pyside/QML will be available at least for Ubuntu-phone, > that would be very handy. > > Best regards, > Luke > ------------------------------ > Date: Sun, 14 Jul 2013 18:11:39 -0500 > Subject: Re: [Ubuntu-phone] Memory question > From: [email protected] > To: [email protected] > CC: [email protected] > > Java is hardly the major multicore programming language. Let's get that > out of the way first. Also, libreoffice has been rewritten into C++ over > the last few years. If any Java remains, it is rapidly becoming > inconsequential. I do agree it has been the dominant platform for dumbphone > apps, but that has zero impact on Ubuntu. As far as smartphone apps... No. > The java language is being used on Android, but it's using the Dalvik VM, > not standard Java libraries and all that. We couldn't support those apps > even if we wanted to. It would be a terrible plan. This has been discussed > numerous times on the mailing list -- use Google to search the mailing list > if you have to. Why would you have to use JavaScript web workers? Why would > those even be helpful? JavaScript is not Java, at all. It's actually > ECMAScript even though it goes by the misnomer of JavaScript, but I still > don't see why those would be necessary when you can simply write some > multicore C++, or C, or whatever. Go and Rust are perfectly capable > multicore oriented languages too. > > Java is unnecessary, but more importantly, it has bad performance > characteristics. It needs significant amounts of RAM to avoid the garbage > collector thrashing the CPU. This article goes into great depth about why > Java and JavaScript naturally perform poorly on mobile devices: > http://sealedabstract.com/rants/why-mobile-web-apps-are-slow/ > > The guy is very wrong about some of the hardware aspects in that article, > particularly regarding the relative speeds of ARM and x86, but his analysis > of the software side of things is fairly competent. > > Ubuntu touch is centered around Qt, being coded in a combination of QML, > JavaScript, and C++, with any combination of those languages or just one. > On Jul 14, 2013 6:01 PM, "Luke Bryan" <[email protected]> wrote: > > What do you mean by, Ubuntu won't use Java? Java has been *the* major > multi-core programming language, *the* platform for smartphone and > "dumb-phones" apps, and has come with Ubuntu by default, for a long time > now. So will Java, and apps like LibreOffice now be unsupported? Will we > have to use Javascript web-workers instead, for high performance multicore > applications? > > Best regards > Luke > > ------------------------------ > Date: Sat, 13 Jul 2013 21:15:03 +0200 > Subject: Re: [Ubuntu-phone] Memory question > From: [email protected] > To: [email protected] > CC: [email protected]; [email protected] > > And after all Ubuntu doesn't use Java, so I think that memory consumption > will remain at a reasonable level. > Il giorno 13/lug/2013 21:06, "Josh Leverette" <[email protected]> ha > scritto: > > Android only does that when it has to, meaning devices with low memory > available. I'm sure Ubuntu will kill apps when it has to, and not a moment > sooner. > > Sincerely, > Josh > On Jul 13, 2013 11:28 AM, "Luke Bryan" <[email protected]> wrote: > > Greetings, > > I was wondering about apps for Ubuntu-touch regarding memory. Will > ubuntu-touch have the (somewhat annoying) feature of killing off apps that > go over 16 or 20 mb (or whatever limit set on the device), as Android does? > This enforces app developers to not make memory-hogging applications, but > it's annoying for the user. Maybe there should be a developer-option to > warn when much memory is used? > > Best regards, > Luke > > -- > Mailing list: https://launchpad.net/~ubuntu-phone > Post to : [email protected] > Unsubscribe : https://launchpad.net/~ubuntu-phone > More help : https://help.launchpad.net/ListHelp > > > -- > Mailing list: https://launchpad.net/~ubuntu-phone > Post to : [email protected] > Unsubscribe : https://launchpad.net/~ubuntu-phone > More help : https://help.launchpad.net/ListHelp > > > -- > Mailing list: https://launchpad.net/~ubuntu-phone > Post to : [email protected] > Unsubscribe : https://launchpad.net/~ubuntu-phone > More help : https://help.launchpad.net/ListHelp > > > -- > Mailing list: https://launchpad.net/~ubuntu-phone > Post to : [email protected] > Unsubscribe : https://launchpad.net/~ubuntu-phone > More help : https://help.launchpad.net/ListHelp > >
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