[Xcb] Question about xcb performance and threading support

[Benoît Minisini]

> Hi,
>
> I have currently using valgrind / callgrind & kcachegrind with the Gambas
> IDE to try to understand why QT4.4 is slower than QT3.
>
> I noticed in the Gambas/QT4 kcachegrind output that pthread_mutex_lock and
> pthread_mutex_unlock take respectively 1.41% and 1.52% of the execution
> time.
>

I forgot to tell that these two functions are called by the libxcb library 
only.

-- 
Benoît