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From: Gerd Hoffmann <kraxel@redhat.com>
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Subject: Re: [Qemu-devel] Spice project is now open
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To: Alexander Graf <agraf@suse.de>
Cc: Yaniv Kamay <ykamay@redhat.com>, Izik Eidus <ieidus@redhat.com>, qemu-devel@nongnu.org

   Hi,

> Well, in fact VNC would wait for the refresh timer of the VGA
> framebuffer dirty thing and only send a single update too.

Well, it isn't that simple.  When copyrect is used updates can be *much* 
more frequently.  Reason is that the vnc server has to push out 
outstanding dirty regions before sending the copyrect command. 
Otherwise the client-side blit would work with stale data.

cheers,
   Gerd