Good writeup. This is probably a silly question, but: The article says he has to use performance.now. But isn't one of the mitigations for Spectre and/or Meltd

Good writeup. This is probably a silly question, but: The article says he has to use performance.now. But isn't one of the mitigations for Spectre and/or Meltdown, to reduce the accurance and/or resolution of performance.now? If so, would that affect his code?