Heavy load under native win32 xemacs 21.5
Fabrice Popineau writes:
I have used spy++ to look at the messages sent to the xemacs window,
and
there is a real high number of WM_CTLCOLORSCROLLBAR messages processed,
which seems a bit strange to me. Is there any reason for that ? I don't
see why messages should be processed while doing nothing.
XEmacs redisplay is very hairy, containing lots of mutually recursive
functionality. The infamous "Metacity maximization infloop" on the Xt
platform is an example (unfortunately, all too typical). I would
guess there's some kind of interaction where a dirty state is being
reset before all of the work is done, and in the process of completing
work something sets a dirty flag---so it all starts over again. Or it
might be that something's polling the scrollbar for some reason.
But I don't do Windows, so I can't be much more help than that.
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