[Gambas-user] sdl Draw event overhead is killing frame rate

[Benoît Minisini]

Le 27/01/2014 13:52, Benoît Minisini a écrit :
> Le 27/01/2014 13:43, Benoît Minisini a écrit :
>>
>> It's difficult for me to test as we have differents cards.
>>
>> But as soon as we are sure that the CPU core running the Gambas program
>> is 10O% busy, (i.e. there is no vsync), we can run the program with
>> valgrind and use kcachegrind to detect which function consumes CPU.
>>
>> I will do that with my intel card. Just do the same, with your program,
>> or the glxgears example.
>>
>> To run valgrind:
>>
>> $ cd /my/gambas/project
>> $ valgrind --tool=callgrind --num-callers=50 gbx3
>> ...
>> ^C
>> $ kcachegrind callgrind.out.<pid>
>>
>> Regards,
>>
>
> OK, apparently there is a problem in the SDL source code: it creates a
> TTF font each time the Draw event is called! I don't know why it does
> that, I will investigate...
>

I think you will be happy with revision #6107. :-)

-- 
Benoît Minisini