static <A> WithSideValue<FunctionResourceUse, A> evaluateWithResourceUse(IF0<A> f) {
  if (!threadAllocatedMemorySane()) ret -1;
  long time1 = nanoTime();
  long value1 = bytesAllocatedByCurrentThread();
  A a = f?!;
  long value2 = bytesAllocatedByCurrentThread();
  long time2 = nanoTime();
  ret withSideValue(FunctionResourceUse()
    .bytesAllocated(value2-value1)
    .runtime(nanosToSecondsObject(time2-time1)), a);
}