Re: animate incredibly slow compared to 21.3

[Kim F. Storm]

Stefan Monnier <address@hidden> writes:

>> I was thinking about the situation where the sit-for in line-move
>> results in a situation where we would adjust the vscroll, and thus
>> update the display once more.  I haven't noticed this myself, but
>> I could envision that may cause flickering.
>
> I see.  If delaying the Xflush prevents flickering, it might be a good cheap
> way to solve this problem.  But I suspect that delaying the Xflush will only
> reduce the flickering (the Xserver will still process two screen updates
> in quick succession, or does it try to drop operations that are overridden
> by subsequent operations already in the queue?).

I don't know the internals of X, but if done properly, the Xserver
updates an internal bitmap and only transfers that to the screen when
flushed by Xflush.

-- 
Kim F. Storm <address@hidden> http://www.cua.dk