Re: [AD] Slowness of sub-bitmaps

[Evert Glebbeek <eglebbk@xxxxxxxxxx>]

On 7 Jul 2009, at 10:55 , Elias Pschernig wrote:
> On Tue, 2009-07-07 at 10:04 -0400, Evert Glebbeek wrote:
> > I noticed the other day that sub bitmaps (in current SVN) are so
> > horribly slow (at least on my MacBook) that they are unusable. Is  
> > this
> > likely to be the same problem that people have reported for font
> > rendering (I'm guessing it is)?
>
> What numbers do you get in ex_clip? Is only the sub-bitmap slow, or  
> also
> the other two?

I get ~98000 for the first, ~65000 for the second and ~60000 for the  
last one.
The program in which I detected the problem is a graphical frontend  
for my chess program: the interface was extremely slow if I was  
drawing the full board every timer tick (1/20 of a second) if I used  
subbitmaps to draw the pieces on the board, but it ran at normal speed  
when I cloned them from the larger bitmap that holds all of them. I  
didn't time it as such though.
I can probably try to rework that piece of code in such a way that you  
can test the difference, if necessary.

Evert