[rrnewton]

Yep, good point -- should have mentioned it.

That's still roughly accurate because Hermit is, today, still ptrace-powered. I'll quote my reply from elsewhere about the WIP high-perf backend:

> The `experimental/reverie-sabre` directory in the Reverie repo contains our high performance backend, but it's still work-in-progress. It uses binary instrumentation and in our early experiments is 10X faster than our current backend in the worst case (i.e. strace is >10X faster when rewritten with reverie-sabre and run on a program that does nothing but syscalls).

Indeed, releasing a faster drop-in "riptrace" strace replacement is one of the goals ;-).