Application.Idle causes high CPU usage

Posted by Neal on Stack Overflow See other posts from Stack Overflow or by Neal
Published on 2010-06-12T14:30:27Z Indexed on 2010/06/12 14:32 UTC
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cpu-usage

Hello,

I use the Application.Idle event to handle toolbar status (enable/disable) etc. quite extensively. As I'm beta testing Norton AntiVirus 2011, it brought to my attention that my app that I'm developing triggered a high CPU usage warning on at least one CPU. Sure enough, I opened the task manager and watched one of the four CPU's (quad core system) go to near 100%.

I thought Application.Idle was the way to handle things when the application wasn't performing CPU tasks. Why is Application.Idle spiking the CPU?

Here is how I attach to the event:

AddHandler Application.Idle, AddressOf OnAppIdle

Been using Application.Idle for a long time, never knew it would have this issue.

Using VS 2010 .NET 4

Thank you.

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