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2009-11-12
, 16:01
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Posts: 3,841 |
Thanked: 1,079 times |
Joined on Nov 2006
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#12
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The interpreter is not running around in the background. It executes the code while it's executing. How much battery is used is only a question of how long the application actually spin the CPU. A lot of applications on the earlier Nokia internet tablets are written in Python, a scripted language, and they're no more CPU/battery hogs than any other applications.
__________________
N800/OS2007|N900/Maemo5
-- Metalayer-crawler delenda est.
-- Current state: Fed up with everything MeeGo.
N800/OS2007|N900/Maemo5
-- Metalayer-crawler delenda est.
-- Current state: Fed up with everything MeeGo.
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2009-11-12
, 16:03
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Posts: 170 |
Thanked: 261 times |
Joined on Feb 2009
@ Gothenburg, Sweden
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#13
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Qt is going to be more widely used and officially supported by Nokia (they have purchased Trolltech the team that created Qt.) But at the moment, Qt is not the sole, canonical development platform - hildon is still widely used and supported.
If you want to have the highest level of community support for your app, including support from Nokia, then going down the C/C++ with Qt path is a very good choice. Python with Qt is also an excellent choice.
If you want to have the highest level of community support for your app, including support from Nokia, then going down the C/C++ with Qt path is a very good choice. Python with Qt is also an excellent choice.
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2009-11-12
, 16:04
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Posts: 170 |
Thanked: 261 times |
Joined on Feb 2009
@ Gothenburg, Sweden
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#14
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Originally Posted by TA-t3
Can you point to benchmarks or profiled code?
The interpreter is not running around in the background. It executes the code while it's executing. How much battery is used is only a question of how long the application actually spin the CPU. A lot of applications on the earlier Nokia internet tablets are written in Python, a scripted language, and they're no more CPU/battery hogs than any other applications.
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2009-11-12
, 16:08
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Posts: 3,841 |
Thanked: 1,079 times |
Joined on Nov 2006
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#15
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No, because there's been no obvious reason to do so. I seem to get exactly as many days out of the battery of my N800 when having Python applications running as when I don't have them running. Remember, most of the time the applications just present a user interface, so there's no CPU usage.
__________________
N800/OS2007|N900/Maemo5
-- Metalayer-crawler delenda est.
-- Current state: Fed up with everything MeeGo.
N800/OS2007|N900/Maemo5
-- Metalayer-crawler delenda est.
-- Current state: Fed up with everything MeeGo.
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2009-11-12
, 17:03
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Posts: 3,319 |
Thanked: 5,610 times |
Joined on Aug 2008
@ Finland
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#16
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Originally Posted by cgarvie
You need to set your dependencies in you package/application, and then the application manager will automatically download any library that is needed, completely transparently to the end-user.
and again cause im a numpty, is PyQt standard on the device. so if an app is developed in pythong with QT. only the App needs installed, as it seems a bit over complicated to expect users to install other tools to use an app. (again if im talking out my rear end do feel free to set me straight)
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2009-11-12
, 17:13
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Posts: 3,319 |
Thanked: 5,610 times |
Joined on Aug 2008
@ Finland
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#17
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As for battery concerns - I feel it's not really a language/framework oriented thing. An error in power management (not really going to sleep, leaking memory, etc) are going to hurt more than any differences caused by language/framework. Also, if one is using a 'real' framework, like Qt, most of the heavy lifting is done in natively compiled libraries - if you stick to a few basic rules (no polling, avoid variable conversions, etc) the battery footprint of such applications is, again, very comparable, regardless if they were written in C, C++, Python or Perl.
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2009-11-12
, 17:42
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Posts: 2,427 |
Thanked: 2,986 times |
Joined on Dec 2007
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#18
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Originally Posted by wire-less
Yeah, sorry. I second the FUD. We're talkin' asynchronous, event-driven UI apps here. We're not drilling for oil. And all the heavy lifting is being done in the C/C++ shared libraries. I have 3 Python apps "running" 24/7, and although they suck memory, they don't suck CPU or battery.
Hi,
QT is a very complete C++ Library, I think it does not make much sense to use it with another language than C++. It does not only provide Gui-Classes. There are datastructures http://doc.trolltech.com/4.5/containers.html
Networking http://doc.trolltech.com/4.5/qtnetwork.html and a lot of other stuff reducing the c++-code you've to write.
Every QT call is feeded with QT Objects. So if you use it with another language there is a lot conversion work by the binding code. And if using from perl you've the interpreter running which eats your battery before lunch
wire-less
__________________
N9: Go white or go home
N9: Go white or go home
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2009-11-13
, 07:48
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Posts: 258 |
Thanked: 144 times |
Joined on Oct 2009
@ Edinburgh
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#19
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Well i was up at 5:30 this morning and installed Qt SDK on my windows lap top as a first pass and managed to build the first examples in C++-GUI-Programming-with-Qt-4-1st-ed.pdf before i had to head out to work. So ive started looking.
Before i can do anything on my Linux box im gonna have to do some work on it. As its previously only been used for mythTV and i've only got about 100M left in the root partition
Before i can do anything on my Linux box im gonna have to do some work on it. As its previously only been used for mythTV and i've only got about 100M left in the root partition
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2009-11-13
, 15:55
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Posts: 332 |
Thanked: 76 times |
Joined on Oct 2007
@ St. Augustine, Trinidad and Tobago
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#20
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I'm a hacker with Perl. I have some scripts that are useful to me. But I don't really have the time and wherewithal to try and turn them in to programs that run with Qt.
What I'd love to see is a packaging thing that will allow me to run one of my scripts from the desktop or menu and display the output in a scrollable box, with two buttons - rerun and quit. It might also have a pull-down menu of the recent scripts I have run.
This would be so much better than using xterm.
What I'd love to see is a packaging thing that will allow me to run one of my scripts from the desktop or menu and display the output in a scrollable box, with two buttons - rerun and quit. It might also have a pull-down menu of the recent scripts I have run.
This would be so much better than using xterm.
__________________
- N900
- N800
- LD-3W
- two magic OTG USB adapters
- crossed fingers
So would a c++ solution not be better battery wise?
and again cause im a numpty, is PyQt standard on the device. so if an app is developed in pythong with QT. only the App needs installed, as it seems a bit over complicated to expect users to install other tools to use an app. (again if im talking out my rear end do feel free to set me straight)