anchor.diff:                  calendar:now_to_local_time(SampleTime)),
       Local_s - UTC_s.
   
  --spec getMonitorRendered() -> html_type().
  +-spec getMonitorRendered() -> [html_type()].
   getMonitorRendered() ->
       DataDump = [{Key, rrd:dump_with(Data, fun monitor_timing_dump_fun_exists/4,
                                       fun monitor_timing_dump_fun_notexists/3)} ||
  
positive.code:     MinMs = Min / 1000,
      MaxMs = Max / 1000,
      StddevMs = math:sqrt(Avg2 - (Avg * Avg)) / 1000,
      {rrd:timestamp2us(To_) / 1000, Count, CountPerS, AvgMs, MinMs, MaxMs, StddevMs}.
  
  -spec monitor_timing_dump_fun_notexists(rrd:rrd(), From::util:time(), To::util:time())
          -> {keep, {TimestampMs::integer(),
                     Value::{Count::0, CountPerS::float(),
                             AvgMs::float(), MinMs::float(), MaxMs::float(), StddevMs::float()}}}.
  monitor_timing_dump_fun_notexists(_DB, _From_, To_) ->
      {keep, {rrd:timestamp2us(To_) / 1000, 0, 0.0, 0.0, 0.0, 0.0, 0.0}}.
  
  %% @doc Gets the difference in seconds from UTC time to local time.
  -spec get_utc_local_diff_s() -> integer().
  
negative.code:     end.
  
  -spec monitor_timing_dump_fun_exists(rrd:rrd(), From::util:time(), To::util:time(), Value::term())
          -> {TimestampMs::integer(), Count::non_neg_integer(), CountPerS::float(),
              AvgMs::float(), MinMs::float(), MaxMs::float(), StddevMs::float()}.
  monitor_timing_dump_fun_exists(_DB, From_, To_, {Sum, Sum2, Count, Min, Max}) ->
      Diff_in_s = timer:now_diff(To_, From_) div 1000000,
      CountPerS = Count / Diff_in_s,
  