anchor.diff:      ets:new(basho_bench_total_errors, [protected, named_table]),
   
       %% Initialize an ETS table to track custom units
  -    ets:new(basho_bench_foo, [protected, named_table]),
  +    ets:new(basho_bench_units, [protected, named_table]),
   
       %% Get the list of operations we'll be using for this test
       F1 =
  
positive.code:     %% 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),
      {reply, ok, State};
  handle_call({op, Op, {error, Reason}, _ElapsedUs}, _From, State) ->
      increment_error_counter(Op),
  
negative.code:     %% Reset latency histograms
      [erlang:put({latencies, Op}, ?NEW_HIST) || Op <- State#state.ops],
      %% Reset units
      [ets:insert(basho_bench_units, {Op, 0}) || Op <- State#state.ops],
  
      %% Write summary
      file:write(State#state.summary_file,
  