I have just observed that, if I open XML files in a text or XML editor, the switching is very quick, like java and property files.
But if I open XML files in Spring Config Editor, then it takes bit time. I am using spring integration and I liked using Spring Config editor, since I can see integration-graph etc details. And I think this is taking a bit time since its generating graph and other GUI components, but in earlier version of STS (2.9.2), there was no delays using that editor.
May be this finding will help narrowing down the root cause?
Also, I have captured few thread dumps but not sure how to send these, as I am bit new to community.
I think, as of now I will keep using text/xml editor for working with XML files.