I have experienced the same thing on my 200MHz NT machine moving from 2.7
to 2.8. The place it is most evident to me is with buttons; in 2.7 there
was no latency between clicking on a button and the button being
highlighted. In 2.8 there is a very noticably latency (probably ~ 500-700
msec). It is very easy to see (at least on my machine), for example, when
you press the "New game" button in FreeCell <grin>. For that reason, I have
not upgraded my FreeCell image to 2.8.

Note that this slow down does not appear to be related to the problem with
having the "Reduce CPU Usage" option enabled.

david

At 04:28 PM 10/4/00 -0400, you wrote:
>Hi Dan & Squeakers!
>
>On the subject of Events cleanup, I thought it would probably be a good time
>to mention something about performance.  I have several Squeak images on my
>machines (all Windows NT boxes), and I have several VMs too.  All of my VMs
>were created by Andreas Raab (the standard fare).
>
>Between 2.7 (VM & image) and 2.8 (VM & image), I have noticed that working
>in morphic has gotten considerably more sluggish.  This slowdown is
>particularly evident when I have lots of morphs in my project.  When I say
>lots of morphs, I mean that I've got a half dozen or so Browsers open, some
>inspectors, some changesets, a file list, etc., and one or two custom morphs
>that I'm working on.
>
>Between 2.8 and 2.9a, I use the same 2.8 VM (the latest from Andreas' site).
>I have noticed that 2.9a is also sluggish, but I haven't really conducted
>any timed tests between 2.8 and 2.9a, so I'm not sure if 2.9a is slow in
>different ways.
>
>I suspect that the slowdown between 2.7 and later revs of Squeak may be due
>to stepping (lots of morphs wanting notification), because updating
>menus/Browsers were added somewhere around that transition time, but my
>memory is fuzzy on that score.
>
>I figured I'd mention this data point in case you good folks on the list or
>at SqC are looking into performance during your code cleanup phase.
>
>Cheers,
>
>---==> Chris
>
>PS>  Perhaps this behavior is platform specific.  Have you Mac, Unix, Acorn,
>CE, etc., folks also seen this kind of thing?
>
>
>
>
--
David Farber
dfarber at numenor.com