[Qt-interest] performance measure of QT in terms of FPS...

[suma s]

hai...
 i am new to QT... please correct me if i am wrong in any way...
actually.. i have a QT application with directfb backend that is built for MIPS.. that uses tablewidget to display some images...once my application is launched ... the images vill be displayed on the DFB-X11 window...when ever the user press any key .. (left,right, up, down) the particular image gets focus and will zoom in.. 
now i just wanted to measure the performance of my application in terms of frames per second...i mean .. i need to measure the number of frames that are rendered by my application... thats why i asked you people...
i saw a module measureFps() in qtdemo... so i just wanted to know.. is it the module that measures number of frames per second ?? is it irrespective of the applications or is it only for qtdemo???...
your help is more expected..--------

Regards

Suma

--- On Fri, 25/3/11, Atlant Schmidt <aschmidt at dekaresearch.com> wrote:

From: Atlant Schmidt <aschmidt at dekaresearch.com>
Subject: RE: [Qt-interest] performance measure of QT in terms of FPS...
To: "'suma s'" <suma_s27 at yahoo.co.in>, "Qt-interest at qt.nokia.com" <Qt-interest at qt.nokia.com>
Date: Friday, 25 March, 2011, 4:16 PM



 
 




 

Suma: 
   
  I think you may need to ask a more-precise question. ;-) 
   
  While certain mobile phone manufacturers may like to brag

  about how their phones achieve “60 FPS” or “30 FPS” for their

  GUIs, what they really seem to mean by that is that their transition

  animations run at those speeds: the little movies that animate

  icons opening and closing or jiggling around on the screen, the

  ability of their graphics to follow your finger dragging graphical

  elements around, and so on. And that’s important, but it’s

  definitely *NOT* the whole story. 
   
  Meanwhile, mere finger presses/mouse clicks on buttons and such

  like don’t really have a “frames per second” rate; they have a

  response time that describes how quickly a button’s on-screen

  graphical representation changes in response to the input

  stimulus and below a certain threshold (say, 50 ms), faster

  response doesn’t matter to real humans. And this response

  time isn’t just a function of the graphical performance (the

  “FPS”) of the system; it’s a complex function of how quickly

  the entire system processes input stimuli, responds to its internal

  events, and so on. And human users are very sensitive to these 
  delays, and especially to variances in these delays. (It’s been

  shown many times that it’s better to be consistently slightly slow

  than to usually process things lightning fast but occasionally delay

  for a much-longer time for no apparent reason.) 
   
  I don’t think there’s a generic Qt framework that turns all this

  into an “FPS” number, but if you can tell us a bit more about

  what you are trying to measure, we can probably help you.



  (Is your boss just asking “How many Frames per Second

  does our UI go?” Tell him “It goes fast enough.” ;-) ) 
   
                                                 Atlant 
   




From: qt-interest-bounces+aschmidt=dekaresearch.com at qt.nokia.com
 [mailto:qt-interest-bounces+aschmidt=dekaresearch.com at qt.nokia.com] On Behalf Of
suma s

Sent: Friday, March 25, 2011 00:47

To: Qt-interest at qt.nokia.com

Subject: [Qt-interest] performance measure of QT in terms of FPS... 

   









hai all.. 

   


i have an application developed in QT and i need to measure the performance of my application in terms of Frames per second(FPS)... 


   


so i just wanted to know.. is there any module in QT that measures the number of Frames Per Second (FPS).. so that i can try integrating it.. in my application..



--------

Regards

Suma 






 








 
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