title: R Studio is running very slow after upgrade to R 4.0.3
body: <p>I have just updated R and Rstudio, because with previous versions RStudio started working slowly 2 days ago.
  Now upgraded R and Rstudio, however sometimes even commands like 1+1 takes more than 5 min to run.</p>
  <p>Do you know the possible solutions to this problem? Packages are located in local directory.</p>