Fair, but that's not rr's target market. AFAIK Simics is not competitive with rr or Pernosco in recording overhead or scalability when you're debugging a Linux

Fair, but that's not rr's target market. AFAIK Simics is not competitive with rr or Pernosco in recording overhead or scalability when you're debugging a Linux user-space application that executes, say, a trillion instructions.