Many thanks for your help. please see my comment below. > [Thread transferred from fltk.development] > > > In my using of FLTK, I found even I write a very simple=20 > > program(only has a empty window, no any widget), when it run=20 > > in my arm board(arm:240MHz, ram:64MB), it will takes about=20 > > 1.2 seonds to display, this time to too long. Can I have any=20 > > method to improve this? Thanks. > > You will need to give us a lot more info; > > - what version of fltk are you using
fltk-2.0-r6136 > - what host OS linux-2.6.24 > - what tool chain arm-linux-g++ > - what window manager / windowing system Tiny-x > One thing that occurs to me is that fltk-2 can be slow to start > initially if it is loading in a lot of fonts and so forth (it seems to > load its fonts differently from fltk-1.x versions). > If so, try fltk-1.1 or fltk-1.3 and see how you get on, or configure > fltk-2 to use simpler font options. > If I am running a empty window, it will still load fonts? I have enable xft in my build option, does this has some effect? How to usr simpler font options in configure? > I mainly use fltk-1.3 now, and do not see responses anywhere near as > slow as you describe. Yes, if the window has initialize, any handle will has quick response, but the initialze is slow. > There are quite a range of performance analysis tools available these > days that will monitor your code as it runs and provide details of how > long each part is taking; it might be informative to instrument your > code start-up sequence and see where the time is really going. > My own personal experience suggests that it is rarely inside fltk itself > - the time is mainly lost in system and support operations... But > without measuring this we can not know for certain. I try to record the time cost in the each process when display a empty window, and found the 2 place cost the most of the time, one is draw() function, the other is setfont() function. > > --=20 > Ian > > > > > SELEX Sensors and Airborne Systems Limited > Registered Office: Sigma House, Christopher Martin Road, Basildon, Essex SS= > 14 3EL > A company registered in England & Wales. Company no. 02426132 > ******************************************************************** > This email and any attachments are confidential to the intended > recipient and may also be privileged. If you are not the intended > recipient please delete it from your system and notify the sender. > You should not copy it or use it for any purpose nor disclose or > distribute its contents to any other person. > ******************************************************************** > _______________________________________________ fltk mailing list [email protected] http://lists.easysw.com/mailman/listinfo/fltk
