Moving the IntensityGraph cursor freezes out all other form activity

[jble]

Unfortunately my latest idea for solution turns out to be not workable - it doesn't scale when we increase the graph history / lower the update rate. The speed of the cursor update becomes unacceptably slow at the lower update rates. I'm back to square one.

Thanks for the tip about the Idea Exchange, will post a product suggestion there. 

[KyleP]

Were you able to track down the reasons why the code I provided was causing ill side effects? My mistake for not actually linking to the Idea Exchange.

Cheers,

[jble]

You can see the nature of the side-effect as follows. Start the debugger on the last project you sent me (that uses System.Timers.Timer). While it's running, open some other application window on your PC (PDF file viewer, whatever) so that it is covering the running Form1 application. Now minimize that other app window. You should see that the scattergraph still holds the image of the other app window. It goes away when you click into the Form1 / scattergraph.

[KyleP]

Hmm, I was not able to reproduce that behavior. I tried a PDF viewer as well as other applications but nothing seemed to interfere with the scatter graph. I wonder if it is an issue with your machine's performance? Try running it on a different computer if possible and see if it's replicated.

Cheers,

[jble]

I'll give it a try on a few other machines. Can you tell me about the machine you used for this test? (XP / Windows7, CPU, memory, ...)  Thanks.

[MilanR]

Hi jble,

I gave Kyle's Timer based application a shot and very briefly see the contents of the window (much less than 1 second) before the graph refreshes, so I do not see the persistent rendering problems either. I am using a Windows 7 machine and performed the tests in Visual Studio 2008 + Measurement Studio 2010 and Visual Studio 2010 + Measurement Studio 2012.

[jble]

OK, thanks for letting me know the PC is running Windows 7. Would you mind also sharing the CPU type/speed and amount of RAM? Just so that I can try to run it on a similar machine on my end. Thanks.

[MilanR]

Hi jble,

I am running a computer with 4GB of memory (2GB free) and Dual Core 2.8 GHz cpu but it is very unlikely that a computer will need specs that high to run the sample application.