We've begun to notice high CPU utilization in our application that contains a WPF diagram. When we create a new, blank diagram with no nodes on it and move the mouse over the diagram, the CPU usage spikes as high as 90%.

We ran a performance profiler on our application code and the highest number of calls and CPU time are being allocated to methods in the Ruler class (due to obfuscation, we don't know exactly which methods, though).

It appears that the Ruler refreshes its scales on every movement of the mouse, which we suspect might be responsible for the CPU usage. Is there any way to confirm this, and possibly implement a workaround for this issue?

Thanks,

Greg

Thanks, Stoyo. We'll give it a shot.