anchor.diff:      %% Update the histogram for the op in question
       Hist = basho_stats_histogram:update(ElapsedUs, erlang:get({latencies, Op})),
       erlang:put({latencies, Op}, Hist),
  -    ets_increment(basho_bench_foo, Op, Units),
  +    ets_increment(basho_bench_units, Op, Units),
       {reply, ok, State};
   handle_call({op, Op, {error, Reason}, _ElapsedUs}, _From, State) ->
       increment_error_counter(Op),
  
positive.code:     %% Reset latency histograms
      [erlang:put({latencies, Op}, ?NEW_HIST) || Op <- State#state.ops],
      %% Reset units
      [ets:insert(basho_bench_foo, {Op, 0}) || Op <- State#state.ops],
  
      %% Write summary
      file:write(State#state.summary_file,
  
negative.code:     lookup_or_zero(basho_bench_errors, Key).
  
  units_counter(Key) ->
      lookup_or_zero(basho_bench_units, Key).
  
  lookup_or_zero(Tab, Key) ->
      case catch(ets:lookup_element(Tab, Key, 2)) of
  