My Visual Studio 2013 Professional with Resharper 8 was considerably slow and sluggish. Sometimes it took several moments for typed character to appear on screen. After trying several things, including disabling Resharper, which did not help, my colleague found a solution: Disable Source Control plugin. For some reason it was enabled after installation. That is OK with me, I understand that some people might be afraid of Git command line interface, so they use gui plugin instead. What makes me angry is the fact the Visual studio re-enables this plugin after restart. So I have to disable it again and again.