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

[Atlant Schmidt]

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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