I have noticed,  that with a complex board pcb can be very slow during
a  trace draw operation. I have noticed that killing other memory
intensive tasks seems to improve pcb's performance. At this point I
consider my views suspect since I havn't documented how much memory pcb
is using out of how much is available.

Steve Meier

der Mouse wrote:
> I hope nobody has been putting many brain cycles into the PCB rendering
> slowness I mentioned a little while back.  Quite by coincidence, I
> found very compelling evidence that the problem isn't in PCB, not even
> if my HID counts as part of "PCB".
>
> I was trying to track down another problem.  Specifically, if I display
> tut1.pcb with the "whole board" zoom setting of 510 and it's fine, set
> zoom to 100 and it draws a small part, as expected, then the machine
> crashes.  (I hasten to add, I do not consider this PCB's fault.  No
> matter _how_ buggy it may be, it shouldn't be able to do that; it's
> running with no access to /dev/mem or any such thing that could justify
> a crash.)
>
> While trying to figure out what's with the crash, I ran PCB under a
> very simple server+mterm+twm session instead of my usual full-fledged X
> session.  The redraw that has usually taken some 45-60 seconds
> completed in maybe one or two seconds.
>
> The really bizarre thing is, when I try it now under my usual session,
> it is a little slower, but still only maybe two to three seconds.
> There's a delay of about five seconds before it starts drawing, and
> that might be worth looking at, but until I figure out WTF is going on
> with this graphics replot speed bizarrity I don't think there's any
> point in even thinking about other speed issues.  I'm trying to imagine
> what possible relevant difference there could be between a freshly
> booted machine and one that's been up for a while.
>
> /~\ The ASCII                         der Mouse
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