I have 3 years old ThinkPad P71 laptop, with 3840x2160 display. Have Fedora 33 installed. I've faced persistent issues with typing lag with all versions of RStudio that I tried, at the moment latest version provided by my distribution is 1.3.1093, and I just tried with 1.4.1087 preview version downloaded from rstudio.com.
I tried all the suggestion that I found on net, in particular with disabling diagnostics, and trying different rendering engines, to no avail. The typing lag is always there, oftentimes it takes couple seconds between typing something and then seeing it in the console. The processor activity also get rather high whenever I do something in RStudio, fans start working very soon. The only help is to decrease size of RStudio window, say to about 1500x1000 and below, but then even if my screen is 17", this is just quarter of the screen and pretty much unusable. Also, when plain R run from a terminal, it's very responsive, so it's definitely something about GUI.
Can someone shed the light about how RStudio is actually doing on-screen rendering, and is there anything else here to try? I have some background in computer graphics, and I really can't understand that rendering text could still, in late 2020, be a problem. Any other scientific IDE that I tried, like Matlab or IntelliJ with R plugin or Juno etc., works fine on my laptop.