static <A> Timed<A> returnTimed(S desc, IF0<A> f) {
  ret returnTimed(f).description(desc);
}

static <A> Timed<A> returnTimed(IF0<A> f) {
  long time = nanos();
  A a = f.get();
  time = nanos()-time;
  ret Timed(a, nsToMS(time));
}

static Timed<O> returnTimed(Runnable r) {
  ret returnTimed(runnableToIF0(r));
}