Clint Singer
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Clint Singer
asked on 11 Jan 2010, 07:48 PM
Hi,
After enabling redraw regions I noticed that the the map control is excessively redrawing. I set up a project with nothing but the map in it to ensure that it wasn't something that I was doing. Even when nothing is happening on the map it is being invalidated multiple times a second. I have a collegue that uses a fairly low powered laptop and IE uses a significant amount of her CPU when the map is visible.
Of course on my i7 I didn't notice it :) Except when the visualizations are enabled; because that amount of flickering would cause seizures.
I would have expected that it would only invalidate if there were items on it that were actually changing.
Cheers,
Clint
After enabling redraw regions I noticed that the the map control is excessively redrawing. I set up a project with nothing but the map in it to ensure that it wasn't something that I was doing. Even when nothing is happening on the map it is being invalidated multiple times a second. I have a collegue that uses a fairly low powered laptop and IE uses a significant amount of her CPU when the map is visible.
Of course on my i7 I didn't notice it :) Except when the visualizations are enabled; because that amount of flickering would cause seizures.
I would have expected that it would only invalidate if there were items on it that were actually changing.
Cheers,
Clint
3 Answers, 1 is accepted
0
Hi Clint,
Thank you for the feedback. That would be a major issue, but I am afraid we cannot reproduce it. Can you send to us your test project for detail research into the problem? Thanks.
All the best,
Andrey Murzov
the Telerik team
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Clint Singer
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answered on 13 Jan 2010, 06:46 PM
Hi,
I am trying to get a sample that repros the problem. I just updated to Internal build 1219 which may have improved the situation in a naked application with only a map in it. It could be also that I didn't wait long enough for the map to stop refreshing as I noticed that it continues to flash even when there doesn't appear to be anything happening but if it is left for a number of seconds the flashing subsides.
Although this situation isn't true with my companys application. I eliminated everywhere where there would be invalidate calls to ensure that map isn't be invalidated by the application. It still stays flickering. Perhaps I have to wait an exceptionally long time for some reason.
I will spend some more time trying to figure out what may be triggering the excessive redrawing.
Cheers,
Clint
I am trying to get a sample that repros the problem. I just updated to Internal build 1219 which may have improved the situation in a naked application with only a map in it. It could be also that I didn't wait long enough for the map to stop refreshing as I noticed that it continues to flash even when there doesn't appear to be anything happening but if it is left for a number of seconds the flashing subsides.
Although this situation isn't true with my companys application. I eliminated everywhere where there would be invalidate calls to ensure that map isn't be invalidated by the application. It still stays flickering. Perhaps I have to wait an exceptionally long time for some reason.
I will spend some more time trying to figure out what may be triggering the excessive redrawing.
Cheers,
Clint
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Clint Singer
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answered on 05 Feb 2010, 05:29 PM
It turns out that the problem was with a bug in DeepZoom.
http://support.microsoft.com/kb/979202
Cheers,
Clint
http://support.microsoft.com/kb/979202
Cheers,
Clint