I have a few different sized vcsims, PM me if you want to use one
I believe that the cost of two syscalls (open(2) only after successful access(2)) would, in our case, at least because we would shave-off something like 1,900,000×90µsec (2.85 minutes) from the three minute boot time for our application.
whoa, I totally missed this: https://jemma.dev/blog/irb-measure /via ruby weekly 1/21
ruby 3.0 has
measure :stackprof or timing for built in metrics.