Size op       perl BerkeleyDB   KyotoCab      Redis     Redis2  RedisFast RedisFast2
------ -- ---------- ---------- ---------- ---------- ---------- ---------- ----------
    20 rd   800000.0     4059.3     4412.1     3667.7     4538.2     4990.0     5217.8
    20 wr   714285.7     4176.2     2523.3     3082.6     4170.1     4747.2     4873.3
   200 rd  1169590.6    24746.3    26430.6     8324.3     9318.8    12487.5    12046.7
   200 wr  2409638.6    29726.5    17913.1     8275.1     8682.4    11898.4    11308.4
   600 rd  2068965.5    76511.1    92307.7     9424.6     8761.3    14136.9    12960.9
   600 wr  2898550.7    72202.2    57066.8    10471.6    11069.5    14948.1    13962.6
  2000 rd  1881467.5   144009.2   138956.4    10658.7     9824.3    14306.4    13094.4
  2000 wr  2638522.4   178269.0   154547.6    10715.2    10597.8    15203.1    14677.6
 20000 rd  1225940.9   146482.6   129354.4     9337.7     9300.4    12765.2    12690.3
 20000 wr  1474600.0   130359.4   242283.3    10723.9    10503.4    14652.1    13632.5
200000 rd   530653.2   119285.1   123884.2     9061.5     9004.3    13044.8    12572.5
200000 wr   637429.9    74454.9   228455.5    10342.3    10269.5    14175.5    14034.8