| Zoom performance and connectors [message #148276] |
Fri, 20 August 2004 15:01  |
Eclipse User |
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Originally posted by: none.bphnx.com
Has anyone noticed any performance issues with Zoom?
Using the logic example, I programatically created 1000 XORGate objects
(10 X 100) and created around 20,000 connections. When I zoom in and out
on this drawing it takes over 1 minute to perform the operation and the
CPU is running around 100%. This is on a P4 2GHz 512MB RAM machine.
The problem seems to come from how many connectors you have. I decreased
the number of connectors by half and then it only took 10-15 seconds to
zoom. Then I decreased the connectors to only 1 per object and the zoom
was nearly instant.
Has anyone seen this before?
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| Re: Zoom performance and connectors [message #148333 is a reply to message #148325] |
Mon, 23 August 2004 15:40  |
| Eclipse User |
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Originally posted by: none.us.ibm.com
The anchors in the logic example already have a check in them to ignore zoom
changes. The problem is that the size of the primary layer is changing.
I thought I had logged this problem once, but I relogged it this morning:
https://bugs.eclipse.org/bugs/show_bug.cgi?id=72436
"bandrews" <none@bphnx.com> wrote in message
news:cgd87a$vlh$1@eclipse.org...
> I am using the ShortestPathConnectionRouter in the logic sample. I
> switched it to the ManhattanConnectionRouter and now the zoom is only 3-5
> seconds. Big difference! Do you know if this problem is logged already? I
> did a search on "zoom" and bugzilla turned up nothing. So basically the
> problem is routing should not occur while zooming?
>
> thanks,
>
> Barry
>
> Randy Hudson wrote:
>
> > The reason is that connection routing is occurring when zoom changes.
Which
> > connection router do you have activated? The shortest-path connection
> > router has something like O(n*n*n*n) performance characterstics, so I'm
not
> > surprised.
>
> > I have unreleased code which will prevent this type of routing during
zoom
> > level changes. I need to make it compatible, as discussed here:
> > http://dev.eclipse.org/mhonarc/lists/gef-dev/msg00390.html
>
> > "bandrews" <none@bphnx.com> wrote in message
> > news:cg5hr5$259$1@eclipse.org...
> > > Has anyone noticed any performance issues with Zoom?
> > > Using the logic example, I programatically created 1000 XORGate
objects
> > > (10 X 100) and created around 20,000 connections. When I zoom in and
out
> > > on this drawing it takes over 1 minute to perform the operation and
the
> > > CPU is running around 100%. This is on a P4 2GHz 512MB RAM machine.
> > >
> > > The problem seems to come from how many connectors you have. I
decreased
> > > the number of connectors by half and then it only took 10-15 seconds
to
> > > zoom. Then I decreased the connectors to only 1 per object and the
zoom
> > > was nearly instant.
> > >
> > > Has anyone seen this before?
> > >
> > >
> > >
> > >
> > >
>
>
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