help.start() caused high CPU loading
Again, if R was using 25% while showing the prompt and waiting for user input, that would be a bug in R.
25% CPU is used by R. And R shows the prompt and waits for user input. Here is a report of the CPU usage by Rgui from Windows command line: C:\Users\Jinso>typeperf "\Process(Rgui)\% Processor Time" -si 5 .... "04/28/2020 13:31:05.895","-1" "04/28/2020 13:31:10.915","0.622494"
I'm not sure how to interpret this. And I don't see where you get the 25% from. I was suggesting something resembling the top command. (Re-iterating, I misinterpreted the ps command).