[Interest] Interest Digest Wiki instructions for PI cross compile do not work for PostgreSQL support

Thu Oct 19 21:04:42 CEST 2017

On Thu, Oct 19, 2017 at 2:43 PM, Roland Hughes <roland at logikalsolutions.com>
wrote:

> Scroll down and watch the video. QML is an 800 lb gorilla trying to ride
> in a 2 cylinder car.
>
> http://www.logikalsolutions.com/wordpress/information-
> technology/raspberry-qt-part-12-qml-blows-big-stinky-chunks/
>

Application used here is of course the best candidate for widgets
implementation as it does not use QtQuick advantages.

Do this:
https://www.youtube.com/watch?v=wulbR2R1GpM
in Qt Widgets and share your results.

But please, do not mislead people. You run this app with software OpenGL on
a device with really weak CPU. Xorg alone eats all resources of RPi 1 as it
has no HW GPU acceleration.
In my company we get 20-25 fps when rendering maps on a quite powerful (for
embedded world) x86 and like 230% CPU usage (of 4 cores) as there is no
linux driver for its GPU. Meanwhile - we get stable 60fps on i.MX6 DualLite
(2 ARMv7 cores 792MHz) with 12-20% CPU usage. All done with QtQuick.

> Nasty worthless resource pig which exists only to pursue script kiddies.
>
> On 10/19/2017 04:38 AM, Vlad Stelmahovsky wrote:
>
> QML is not that resource hogging as JS. dont use JS and you'll be fine
>
> On Tue, Oct 17, 2017 at 8:11 PM, Roland Hughes <
> roland at logikalsolutions.com> wrote:
>
>>
>>
>> On 10/17/2017 12:54 PM, interest-request at qt-project.org wrote:
>>
>> On ter?a-feira, 17 de outubro de 2017 08:11:13 PDT Roland Hughes wrote:
>>
>> The bug tracking system is under our control - it will not just
>> disappear (from our perspective).
>>
>> Oh yes it will!
>>
>> Speaking as someone who has heard that soooooo many times before, let's
>> just count a few for Qt shall we.
>>
>> The Trolltech bug database was never going to just disappear (from our
>> perspective). It did. A tiny fraction of the bugs migrated to the new
>> system but most were mass exterminated with
>>
>> The TT TT was not a public database. It existed internally only. When we
>> switched to a public bugtracker, we could only export some entries since many
>> had confidential customer information. Those that were exported had to be
>> review by a person to make sure we were not violation any NDAs or
>> confidentiality.
>>
>> That's the same reason why the code repository starts with Qt 4.5, not earlier
>> versions.
>>
>>
>> "The version this bug is reported against is no longer supported..."
>>
>> The Nokia bug tracker was never going to just disappear (from our
>> perspective). It did. Few, if any of the older bugs made it into the
>> current database. Most were mass exterminated with
>>
>> There was no Nokia database. We switched straight from the internal tdb
>> (that's what it was called) to JIRA.
>>
>> There was a Nokia bug base as well, at least for a while. I and others
>> entered bugs into it back in the day. Your argument also re-enforces a
>> great many bugs "simply disappeared."
>>
>> I hear from quite a few companies in similar boats. They started
>> development for a medical/industrial device which had a lengthy
>> testing/approval process, filed bug reports for that version only to see
>> them rot or fall victim to a mass extermination.
>>
>> Most open source projects don't support old versions, since they don't have
>> the manpower to do so.
>>
>>
>> The current owners of Qt and the current OpenSource maintainers don't
>> offer or seem to understand the concept of an LTS (Long Term Support)
>> version. They are constantly pursuing script kiddies and that worthless
>> QML instead of maintaining the base which built them. This will soon
>> force a fork in the OpenSource project. One which rips out all of the
>> QML and focuses on nothing but bug fixes for 12 years. Yes, 12 years.
>>
>> Again, offence taken.
>>
>> Take all of the offense you want. Medical devices and industrial controls
>> need LTS versions, not resource hogging QML features. Qt's chasing of the
>> idiot phone market which has 6 months at best life spans is alienating and
>> chasing away the very industries which made Qt successful.
>>
>> I don't know who plans on forking. There's no such division in the community,
>> so any attempt to do so will probably start with very few developers. Almost
>> certainly, fewer than critical mass to maintain the codebase.
>>
>> See TQt (Trinity Project) for an example of a fork attempt.
>>
>> It's easy to fork something you have been maintaining internally for
>> years. There _IS_ such a division. You don't know about it because they
>> don't come here. They justifiably believe they've been abandoned. The
>> relentless pursuit of "new cool features" to please the phone crowd is
>> causing the much larger medical device and industrial control industries to
>> create their own LTS.
>>
>> How many questions have you seen on here over the past 18 months about Qt
>> 3? That project Harmman (sp?) calls about periodically sells north of a
>> million units per year and the company is maintaining Qt 3 on its own so
>> they can make minor product enhancements which don't have to go though
>> multi-year clinical trials. They aren't the only calls I get about products
>> using Qt 3, 4.2, and the most likely soon to be orphaned (if not already)
>> 4.8. Every company I am contacted about using earlier versions has their
>> own staff maintaining the code base today. They have had no other choice.
>> If anything, joining forces with someone who is not a competitor but using
>> the same tool set will lighten their load.
>>
>> --
>> Roland Hughes, President
>> Logikal Solutions(630)-205-1593 <(630)%20205-1593>
>> http://www.theminimumyouneedtoknow.comhttp://www.infiniteexposure.nethttp://www.johnsmith-book.comhttp://www.logikalblog.comhttp://www.interestingauthors.com/bloghttp://lesedi.us/http://onedollarcontentstore.com
>>
>>
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>>
>
>
> --
> Best regards,
> Vlad
>
>
> --
> Roland Hughes, President
> Logikal Solutions(630)-205-1593 <(630)%20205-1593>
> http://www.theminimumyouneedtoknow.comhttp://www.infiniteexposure.nethttp://www.johnsmith-book.comhttp://www.logikalblog.comhttp://www.interestingauthors.com/bloghttp://lesedi.us/http://onedollarcontentstore.com
>
>
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