Yeah, decent sampling for requests that last 10s of ms seems absolutely feasible with this approach, unlike the current setitimer(2) stuff. I'm really looking

Yeah, decent sampling for requests that last 10s of ms seems absolutely feasible with this approach, unlike the current setitimer(2) stuff. I'm really looking forward to taking it for a spin soon and see how far the sampling rate can be pushed without introducing noticeable overhead in practice!