// returns result of function
static <A> A benchForSeconds(double n, S desc default str(f), IF0<A> f) {
  ret benchForNSeconds(n, desc, f);
}

sO benchForSeconds(double n, S desc default str(r), Runnable r) {
  ret benchForNSeconds(n, desc, runnableToIF0(r));
}

// returns minimal time needed
static long benchForSeconds(S desc default str(r), Runnable r, double n) {
  ret benchForNSeconds(desc, r, n);
}