Rstudio is now unusably slow

Suddenly, Rstudio was painfully slow, and now it is unusable. This means, I open it up and there is a lag of several seconds if type anything. I have explored all the options I can come up with: re-installing both R and Rstudio, trying to resetsettings.... the obvious things such as clearing the workspace and the console. The size of my data is negligible. I cannot think of anything else.

Maybe this thread addresses your issue?