Long time Youtube lurker here, so firstly, thanks for the great series, keep 'em coming.
Since the implementation of the 'blue' debug graph I have noticed what I believe to be a minor bug that has been 'bugging' me :)
The very first bar upon loading compares the RDTSC to zero, which makes the value of the bar meaningless (pretty much). It would, I assume be better to set the 'last RDTSC value' to the RDTSC, rather than 0.
Sorry I can't be more specific, but I have not preordered the game so do not have access to the code.
Best regards