x => efe0945164a7e582241f37ae8983c075f8f2e870-select-zipfian-throughput.log 
y => timeout-select-zipfian-throughput.log 

    n   min   max median  average   stddev      p99
x 899 31083 61943  55924 55885.54 2730.871 61007.56
y 899 29197 62220  57667 57579.76 1721.328 60553.70

      50000                      55000                       60000              
 |------+--------------------------+---------------------------+---------------|
                               +--------+--------+                              
1    --------------------------|        |        |------------------------      
                               +--------+--------+                              
                                             +----+----+                        
2                              --------------|    |    |--------------          
                                             +----+----+                        
Legend: 1=data$x, 2=data$y

At 95% probablitiy:
===> average is statistically significant     (p=0.000000, diff ~1694.225806)
===> variance is statistically significant    (p=0.000000)