I have encountered an issue where VS2012 will suddenly start using a high amount of CPU, and typing or basically any action becomes very slow. The easiest way to replicate is just to start typing or simply click in the editor, or scroll up/down.
This occurs in C# and C++ languages. I have run VS in safe mode, as administrator, with Intellisense and Completion off, and it still occurs. This also occurs with brand new projects, using no extensions. It occurs with all "Visual Experience" options on or off. I have done a repair as well, and it still occurs. I am on the latest SP too, and all recent Windows Updates are installed. I have also reformatted the machine, same issue comes back.
Looking at Process Explorer, the UIAutomationCore.dll!UiaNodeFromFocus thread always seems to pop up to the top of CPU usage, with devenv.exe being at the top, then a large number of DllGetClassObjectInternal threads. Memory usage also jumps, from ~100MB to over 1GB or more. The condition does not go away until I close VS, and comes back shortly after reopening and typing.
It also happened in VS2010, which I have uninstalled.
System Details:
- i7-2820QM
- 16GB ram
- 500gb SSD (occured with a spinner as well)
- win 7 64bit
Any help is appreciated, as this is an infuriating issue! Thanks!