ubuntu-phone team mailing list archive

[Gianguido Sorà <gianguidorama@xxxxxxxxx>]

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 <llrraa@xxxxxx>

> 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"<luke32j@xxxxxxx>;
> *Date: * Mon, Jul 15, 2013 01:09 PM
> *To: * "ubuntu-phone@xxxxxxxxxxxxxxxxxxx"<ubuntu-phone@xxxxxxxxxxxxxxxxxxx>;
> **
> *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: coder543@xxxxxxxxx
> To: luke32j@xxxxxxx
> CC: ubuntu-phone@xxxxxxxxxxxxxxxxxxx
>
> 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" <luke32j@xxxxxxx> 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: gianguidorama@xxxxxxxxx
> To: coder543@xxxxxxxxx
> CC: ubuntu-phone@xxxxxxxxxxxxxxxxxxx; luke32j@xxxxxxx
>
> 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" <coder543@xxxxxxxxx> 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" <luke32j@xxxxxxx> 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
>
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