merge QPS for 1, 4, 16, 32 threads
ops/sec mb/sec  L0_GB   Sum_GB  W-Amp   W-MB/s  usec/op p50     p75     p99     p99.9   p99.99  Uptime  Stall-time      Stall%  Test
86694   34.7    123.6   2038.8  16.4    589.2   11.5    6.3     7.8     172     185     234     3543    00:18:23.863    31.2    mergerandom.t1.s0
84998   34.0    121.4   2028.8  16.7    586.3   11.8    43.4    51.3    194     240     430     3543    00:04:23.355    7.4     mergerandom.t4.s0
88910   35.6    127.1   2073.9  16.3    598.3   11.2    150.0   199.0   345     428     1484    3549    00:09:32.971    16.1    mergerandom.t16.s0
91949   36.8    131.6   2069.3  15.7    596.0   10.9    322.8   393.4   608     917     4063    3555    00:10:41.759    18.1    mergerandom.t32.s0

read QPS with 1 merge and 1, 4, 16, 32 point read threads
ops/sec mb/sec  L0_GB   Sum_GB  W-Amp   W-MB/s  usec/op p50     p75     p99     p99.9   p99.99  Uptime  Stall-time      Stall%  Test
6048    2.4     13.2    211.7   16.0    61.1    165.3   139.4   160.7   959     2412    19734   3545    00:00:0.000     0.0     readwhilemerging.t1
16010   6.4     12.9    209.2   16.2    60.3    62.5    164.9   244.9   1914    2923    88033   3551    00:00:0.000     0.0     readwhilemerging.t4
42778   17.1    10.2    174.7   17.1    50.3    23.4    259.0   388.4   2346    3843    120028  3553    00:00:0.000     0.0     readwhilemerging.t16
64756   25.9    8.5     143.8   16.9    41.3    15.4    358.9   544.8   2697    4581    122801  3560    00:00:0.000     0.0     readwhilemerging.t32

10 row scan QPS with 1 merge and 1, 4, 16, 32 scan threads
ops/sec mb/sec  L0_GB   Sum_GB  W-Amp   W-MB/s  usec/op p50     p75     p99     p99.9   p99.99  Uptime  Stall-time      Stall%  Test
2601    10.4    13.4    203.2   15.1    57.7    384.4   314.4   400.4   1880    3934    118842  3604    00:00:0.000     0.0     fwdrangewhilemerging.t1
8907    35.7    13.1    207.0   15.8    58.8    112.3   323.4   449.9   2345    4179    124523  3604    00:00:0.000     0.0     fwdrangewhilemerging.t4
25106   100.6   10.4    168.0   16.1    47.7    39.8    470.4   663.0   2909    5350    128653  3606    00:00:0.000     0.0     fwdrangewhilemerging.t16
38319   153.5   7.9     121.7   15.4    34.5    26.1    646.2   957.3   3307    6118    128613  3607    00:00:0.000     0.0     fwdrangewhilemerging.t32