Sure, it's Rstudio that's the slow one for me. I get a really long spinner on the package pane when it tries to list packages. It get really long spinner when I try to check for package updates (the three dots on the Update Packages screen) or try to close Rstudio. It hits some projects a lot harder than others. The only fix I have found is to add the processes Rterm.exe, rsession.exe, rstudio.exe, git.exe to the list of Windows Defender Exclusions.