1. 05 Mar, 2018 4 commits
    • Kirill Smelkov's avatar
      X rio localhost timings after switch to zwrk & stabilizing output format · 2d0b54ad
      Kirill Smelkov authored
      Like in previous commit should not be changing compared to 39a77e3b, but
      it was not checked.
      2d0b54ad
    • Kirill Smelkov's avatar
      X noturbo deco timings after switch to zwrk + stabilizing neotest output format · ea5f9d26
      Kirill Smelkov authored
      Compared to 0ed7b1fc there should not be a difference (checked only on
      serial cases with manually ediging 20180221-deco-noturbo-noz.txt-fix to
      use updated output format for wczblk1-8 dataset):
      
      $ benchstat -split node,cluster,dataset 20180221-deco-noturbo-noz.txt-fix 20180305-deco-noturbo-c.txt
      name                                      old pystone/s    new pystone/s    delta
      node:deco
      pystone                                         221k ± 0%        219k ± 3%     ~     (p=0.690 n=5+5)
      
      name                                      old time/op      new time/op      delta
      node:deco
      sha1/py/1K                                    1.85µs ± 2%      1.84µs ± 1%     ~     (p=0.508 n=5+5)
      sha1/go/1K                                    1.53µs ± 0%      1.53µs ± 0%     ~     (p=0.103 n=5+5)
      sha1/py/4K                                    6.68µs ± 1%      6.69µs ± 0%     ~     (p=0.151 n=5+5)
      sha1/go/4K                                    5.59µs ± 0%      5.59µs ± 0%     ~     (p=0.333 n=5+5)
      sha1/py/2M                                    3.18ms ± 0%      3.18ms ± 0%     ~     (p=0.421 n=5+5)
      sha1/go/2M                                    2.78ms ± 0%      2.78ms ± 0%     ~     (p=1.000 n=5+5)
      unzlib/py/null-1K                             2.81µs ± 0%      2.91µs ± 3%   +3.49%  (p=0.008 n=5+5)
      unzlib/go/null-1K                             2.86µs ± 0%      2.88µs ± 1%   +0.93%  (p=0.008 n=5+5)
      unzlib/py/null-4K                             11.3µs ± 1%      11.4µs ± 2%   +0.89%  (p=0.040 n=5+5)
      unzlib/go/null-4K                             11.3µs ± 0%      11.4µs ± 0%   +0.89%  (p=0.008 n=5+5)
      unzlib/py/null-2M                             5.71ms ± 5%      5.66ms ± 3%     ~     (p=1.000 n=5+5)
      unzlib/go/null-2M                             4.79ms ± 0%      4.79ms ± 0%     ~     (p=0.095 n=5+5)
      unzlib/py/prod1-avg                           5.02µs ± 1%      5.06µs ± 0%     ~     (p=0.057 n=4+4)
      unzlib/go/prod1-avg                           5.27µs ± 1%      5.33µs ± 1%     ~     (p=0.087 n=5+5)
      unzlib/py/prod1-max                            512µs ± 2%       438µs ± 5%  -14.45%  (p=0.008 n=5+5)
      unzlib/go/prod1-max                            336µs ± 0%       352µs ± 4%   +4.67%  (p=0.008 n=5+5)
      disk/randread/direct/4K-min                    105µs ± 1%       105µs ± 0%     ~     (p=1.000 n=5+5)
      disk/randread/direct/4K-avg                    144µs ± 0%       142µs ± 0%   -1.54%  (p=0.008 n=5+5)
      disk/randread/direct/2M-min                   5.48ms ± 3%      5.34ms ± 3%     ~     (p=0.135 n=5+5)
      disk/randread/direct/2M-avg                   6.13ms ± 1%      6.04ms ± 2%     ~     (p=0.056 n=5+5)
      disk/randread/pagecache/4K-min                 570ns ± 1%       583ns ± 1%   +2.28%  (p=0.008 n=5+5)
      disk/randread/pagecache/4K-avg                 975ns ± 0%      1003ns ± 1%   +2.91%  (p=0.008 n=5+5)
      disk/randread/pagecache/2M-min                 195µs ± 4%       197µs ± 4%     ~     (p=0.690 n=5+5)
      disk/randread/pagecache/2M-avg                 214µs ± 0%       220µs ± 1%   +2.80%  (p=0.008 n=5+5)
      
      name                                      old time/object  new time/object  delta
      cluster:deco dataset:wczblk1-8
      fs1-zhash.py                                  20.3µs ± 1%      20.2µs ± 1%     ~     (p=0.444 n=5+4)
      fs1-zhash.go                                  3.20µs ± 0%      3.20µs ± 0%     ~     (all equal)
      fs1-zhash.go+prefetch128                      4.16µs ± 4%      4.14µs ± 6%     ~     (p=0.952 n=5+5)
      zeo/py/fs1-zhash.py                            375µs ± 4%       379µs ± 3%     ~     (p=0.690 n=5+5)
      neo/py/sqlite-zhash.py                         355µs ± 6%       362µs ± 6%     ~     (p=0.421 n=5+5)
      neo/py/sqlite-zhash.go                         156µs ± 2%       158µs ± 1%     ~     (p=0.151 n=5+5)
      neo/py/sqlite-zhash.go+prefetch128             134µs ± 2%       135µs ± 1%     ~     (p=0.421 n=5+5)
      neo/py(!log)/sqlite-zhash.py                   326µs ± 3%       335µs ± 4%     ~     (p=0.381 n=5+5)
      neo/py(!log)/sqlite-zhash.go                   143µs ± 3%       145µs ± 2%     ~     (p=0.508 n=5+5)
      neo/py(!log)/sqlite-zhash.go+prefetch128       119µs ± 2%       118µs ± 1%     ~     (p=0.421 n=5+5)
      neo/py/sql-zhash.py                            466µs ±45%       392µs ± 5%     ~     (p=0.111 n=5+4)
      neo/py/sql-zhash.go                            201µs ± 2%       197µs ± 1%   -1.63%  (p=0.008 n=5+5)
      neo/py/sql-zhash.go+prefetch128                184µs ± 2%       180µs ± 2%   -1.96%  (p=0.032 n=5+5)
      neo/py(!log)/sql-zhash.py                      375µs ± 2%       454µs ±61%     ~     (p=0.286 n=4+5)
      neo/py(!log)/sql-zhash.go                      182µs ± 2%       183µs ± 1%     ~     (p=0.802 n=5+5)
      neo/py(!log)/sql-zhash.go+prefetch128          164µs ± 1%       164µs ± 2%     ~     (p=0.881 n=5+5)
      neo/go/fs1-zhash.py                            226µs ± 1%       227µs ± 2%     ~     (p=0.397 n=5+5)
      neo/go/fs1-zhash.go                           56.8µs ± 1%      56.9µs ± 1%     ~     (p=0.889 n=5+5)
      neo/go/fs1-zhash.go+prefetch128               24.8µs ± 3%      24.7µs ± 2%     ~     (p=0.651 n=5+5)
      neo/go/sqlite-zhash.py                         264µs ± 4%       269µs ± 1%     ~     (p=0.548 n=5+5)
      neo/go/sqlite-zhash.go                        93.5µs ± 0%      92.7µs ± 0%   -0.83%  (p=0.008 n=5+5)
      neo/go/sqlite-zhash.go+prefetch128            39.3µs ± 4%      39.8µs ± 8%     ~     (p=0.952 n=5+5)
      
      ( not sure what it was for unzlib/py/prod1-max - probaby some background process
        was also running last time at that test )
      ea5f9d26
    • Kirill Smelkov's avatar
      . · 7c21fb98
      Kirill Smelkov authored
      7c21fb98
    • Kirill Smelkov's avatar
  2. 04 Mar, 2018 9 commits
  3. 02 Mar, 2018 6 commits
  4. 01 Mar, 2018 2 commits
  5. 28 Feb, 2018 9 commits
  6. 27 Feb, 2018 2 commits
  7. 26 Feb, 2018 5 commits
  8. 23 Feb, 2018 1 commit
    • Kirill Smelkov's avatar
      X teach golang to access ZEO · a16e8d52
      Kirill Smelkov authored
      For the reference on deco (performance, frequence not fixed):
      
      	name                           time/object
      	deco/fs1/zhash.py              15.8µs ± 2%
      	deco/fs1/zhash.py-P16           116µs ±12%
      	deco/fs1/zhash.go              2.60µs ± 0%
      	deco/fs1/zhash.go+prefetch128  3.70µs ±11%
      	deco/fs1/zhash.go-P16          13.4µs ±43%
      	deco/zeo/zhash.py               316µs ± 7%
      	deco/zeo/zhash.py-P16          2.68ms ± 7%
      	deco/zeo/zhash.go               111µs ± 2%
      	deco/zeo/zhash.go+prefetch128  57.7µs ± 2%
      	deco/zeo/zhash.go-P16          1.23ms ± 5%
      a16e8d52
  9. 22 Feb, 2018 2 commits
    • Kirill Smelkov's avatar
      X rio: localhost timings (only performance governor, C-states are enabled, turbo not disabled...) · 39a77e3b
      Kirill Smelkov authored
      Compared to 55a64368 (rio localhost; 2017-11-06) the change is in kernel:
      
      -# Linux rio 4.13.0-1-amd64 #1 SMP Debian 4.13.4-2 (2017-10-15) x86_64 GNU/Linux
      +# Linux rio 4.15.0-1-amd64 #1 SMP Debian 4.15.4-1 (2018-02-18) x86_64 GNU/Linux
      
      and in particular 4.15 comes with PTI.
      
      summary:
      
      - direct disk 4K read is ~ 93µs as it was
      - pagecache is now slower due to PTI: the timing changed 0.6µs -> 0.8µs
      - fs1.py access is ~2% slower, probably due to PTI
      - fs1.go access is much slower due to client cache being always bolted
        on: 2.4µs -> 3.8µs (serial). The time for both serial and parallel
        cases is still small.
      - zeo is ~2% slower, probably due to PTI.
      - neo/py/sqlite vs zhash.py is 8% faster - because we removed
        data compression from the benchmark (b9827725), however P16 time is
        not improved.
      - neo/py/sqlite vs zhash.go is 40% faster - because we removed data
        compression from the benchmark and previously neo/go code was very
        inefficient at zlib decompression (924831e7, 9acb87a8, 57524491).
        However P16 time is improved only by 2-5%.
      - neo/py/sql vs zhash.{py,go} - similar changes to neo/py/sqlite
      - neo/go/fs1 vs zhash.py - unchanged; vs zhash.go - slower by 12% -
        probably due to PTI. zhash.go P16 case is improved by ~35% but it
        could be all noise.
      - newly introduces neo/go/sqlite vs zhash.go is at ~ 80-88µs for serial
        and ~ 230-300µs for P16 latencies (neo/py/sqlite for the same vs
        zhash.go is at ~ 120-130µs for serial and ~1600µs for P16 latencies).
        Clearly neo/go/sqlite needs more work.
      
      Full details:
      
      $ benchstat -split dataset 20180222-rio.txt  |grep sqlite |grep 'neo.go'
      rio/neo/go/sqlite/zhash.py                      230µs ± 2%
      rio/neo/go/sqlite/zhash.py-P16                  937µs ± 5%
      rio/neo/go/sqlite/zhash.go                     88.4µs ± 2%
      rio/neo/go/sqlite/zhash.go+prefetch128         33.6µs ± 7%
      rio/neo/go/sqlite/zhash.go-P16                  228µs ±39%
      rio/neo/go/sqlite(!sha1)/zhash.go              79.7µs ± 3%
      rio/neo/go/sqlite(!sha1)/zhash.go+prefetch128  32.2µs ± 8%
      rio/neo/go/sqlite(!sha1)/zhash.go-P16           213µs ±42%
      rio/neo/go/sqlite/zhash.py                      232µs ± 2%
      rio/neo/go/sqlite/zhash.py-P16                 1.00ms ± 3%
      rio/neo/go/sqlite/zhash.go                     79.2µs ± 2%
      rio/neo/go/sqlite/zhash.go+prefetch128         29.8µs ± 8%
      rio/neo/go/sqlite/zhash.go-P16                  302µs ±40%
      rio/neo/go/sqlite(!sha1)/zhash.go              78.3µs ± 2%
      rio/neo/go/sqlite(!sha1)/zhash.go+prefetch128  31.1µs ± 2%
      rio/neo/go/sqlite(!sha1)/zhash.go-P16           311µs ±40%
      
      $ benchstat -split dataset 20171106-time-rio-Cenabled.txt 20180222-rio.txt
      
      name                                          old pystone/s    new pystone/s    delta
      rio/pystone                                         178k ± 2%        180k ± 3%      ~     (p=0.421 n=5+5)
      
      name                                          old time/op      new time/op      delta
      rio/disk/randread/direct/4K-min                   34.0µs ± 1%      34.7µs ± 1%    +2.06%  (p=0.008 n=5+5)
      rio/disk/randread/direct/4K-avg                   92.9µs ± 0%      93.2µs ± 0%    +0.37%  (p=0.024 n=5+5)
      rio/disk/randread/pagecache/4K-min                 221ns ± 0%       441ns ± 0%   +99.37%  (p=0.016 n=4+5)
      rio/disk/randread/pagecache/4K-avg                 637ns ± 0%       872ns ± 1%   +37.01%  (p=0.016 n=4+5)
      
      name                                          old time/object  new time/object  delta
      dataset:wczblk1-8
      rio/fs1/zhash.py                                  22.3µs ± 2%      22.8µs ± 2%    +2.24%  (p=0.048 n=5+5)
      rio/fs1/zhash.py-P16                              51.7µs ±72%      60.3µs ±49%      ~     (p=0.127 n=15+16)
      rio/fs1/zhash.go                                  2.40µs ± 0%      3.80µs ± 0%   +58.33%  (p=0.016 n=5+4)
      rio/fs1/zhash.go+prefetch128                      4.34µs ± 8%      4.10µs ± 2%      ~     (p=0.246 n=5+5)
      rio/fs1/zhash.go-P16                              3.58µs ±24%      6.79µs ±19%   +90.01%  (p=0.000 n=16+14)
      rio/zeo/zhash.py                                   336µs ± 2%       342µs ± 2%    +1.82%  (p=0.040 n=5+5)
      rio/zeo/zhash.py-P16                              1.61ms ±19%      1.64ms ±20%      ~     (p=0.423 n=16+16)
      rio/neo/py/sqlite/zhash.py                         304µs ± 6%       279µs ± 3%    -8.11%  (p=0.016 n=5+5)
      rio/neo/py/sqlite/zhash.py-P16                    2.19ms ± 0%      2.28ms ± 1%    +4.16%  (p=0.000 n=13+15)
      rio/neo/py/sqlite/zhash.go                         248µs ± 1%       147µs ± 2%   -40.70%  (p=0.008 n=5+5)
      rio/neo/py/sqlite/zhash.go+prefetch128             125µs ± 1%       125µs ± 2%      ~     (p=0.651 n=5+5)
      rio/neo/py/sqlite/zhash.go-P16                    1.76ms ±13%      1.73ms ±14%    -1.72%  (p=0.002 n=16+16)
      rio/neo/py(!log)/sqlite/zhash.py                   291µs ± 2%       267µs ± 1%    -8.20%  (p=0.008 n=5+5)
      rio/neo/py(!log)/sqlite/zhash.py-P16              2.01ms ± 2%      2.01ms ± 1%      ~     (p=0.545 n=16+15)
      rio/neo/py(!log)/sqlite/zhash.go                   231µs ± 1%       130µs ± 2%   -43.54%  (p=0.008 n=5+5)
      rio/neo/py(!log)/sqlite/zhash.go+prefetch128       110µs ± 2%       112µs ± 4%      ~     (p=0.222 n=5+5)
      rio/neo/py(!log)/sqlite/zhash.go-P16              1.62ms ± 7%      1.62ms ± 0%    +0.18%  (p=0.029 n=16+11)
      rio/neo/py/sql/zhash.py                            325µs ± 4%       294µs ± 1%    -9.50%  (p=0.029 n=4+4)
      rio/neo/py/sql/zhash.py-P16                       2.88ms ± 1%      2.85ms ± 1%    -0.94%  (p=0.000 n=15+15)
      rio/neo/py/sql/zhash.go                            275µs ± 2%       169µs ± 3%   -38.39%  (p=0.008 n=5+5)
      rio/neo/py/sql/zhash.go+prefetch128                154µs ± 3%       154µs ± 4%      ~     (p=1.000 n=5+5)
      rio/neo/py/sql/zhash.go-P16                       2.30ms ± 8%      2.19ms ±11%    -5.03%  (p=0.009 n=16+16)
      rio/neo/py(!log)/sql/zhash.py                      313µs ± 4%       285µs ± 5%    -8.95%  (p=0.029 n=4+4)
      rio/neo/py(!log)/sql/zhash.py-P16                 2.56ms ± 1%      2.47ms ± 1%    -3.45%  (p=0.000 n=15+14)
      rio/neo/py(!log)/sql/zhash.go                      258µs ± 1%       152µs ± 1%   -41.05%  (p=0.016 n=5+4)
      rio/neo/py(!log)/sql/zhash.go+prefetch128          139µs ± 1%       137µs ± 3%      ~     (p=0.151 n=5+5)
      rio/neo/py(!log)/sql/zhash.go-P16                 2.21ms ± 5%      1.98ms ± 0%   -10.19%  (p=0.000 n=16+11)
      rio/neo/go/fs1/zhash.py                            190µs ± 3%       190µs ± 4%      ~     (p=1.000 n=5+5)
      rio/neo/go/fs1/zhash.py-P16                        784µs ± 9%       755µs ± 7%    -3.69%  (p=0.018 n=16+16)
      rio/neo/go/fs1/zhash.go                           52.0µs ± 1%      58.0µs ± 3%   +11.55%  (p=0.008 n=5+5)
      rio/neo/go/fs1/zhash.go+prefetch128               26.6µs ± 5%      24.9µs ± 4%      ~     (p=0.087 n=5+5)
      rio/neo/go/fs1/zhash.go-P16                        256µs ± 6%       164µs ±50%   -36.13%  (p=0.000 n=15+16)
      rio/neo/go/fs1(!sha1)/zhash.go                    35.3µs ± 4%      37.3µs ± 2%    +5.73%  (p=0.008 n=5+5)
      rio/neo/go/fs1(!sha1)/zhash.go+prefetch128        17.3µs ± 2%      16.3µs ± 2%    -6.00%  (p=0.008 n=5+5)
      rio/neo/go/fs1(!sha1)/zhash.go-P16                 152µs ±13%       118µs ±51%   -22.57%  (p=0.000 n=13+16)
      dataset:prod1-1024
      rio/fs1/zhash.py                                  18.9µs ± 1%      18.9µs ± 2%      ~     (p=0.825 n=5+5)
      rio/fs1/zhash.py-P16                              58.0µs ±52%      56.2µs ±32%      ~     (p=0.926 n=16+16)
      rio/fs1/zhash.go                                  1.30µs ± 0%      2.80µs ± 0%  +115.38%  (p=0.016 n=4+5)
      rio/fs1/zhash.go+prefetch128                      2.78µs ±14%      2.70µs ± 0%      ~     (p=0.413 n=5+4)
      rio/fs1/zhash.go-P16                              2.24µs ±16%      6.59µs ±43%  +194.93%  (p=0.000 n=14+16)
      rio/zeo/zhash.py                                   302µs ± 7%       294µs ± 6%      ~     (p=0.310 n=5+5)
      rio/zeo/zhash.py-P16                              1.44ms ±11%      1.46ms ± 3%      ~     (p=0.892 n=15+13)
      rio/neo/py/sqlite/zhash.py                         269µs ± 1%       275µs ± 1%    +2.51%  (p=0.008 n=5+5)
      rio/neo/py/sqlite/zhash.py-P16                    2.19ms ± 0%      2.34ms ± 0%    +6.70%  (p=0.000 n=16+13)
      rio/neo/py/sqlite/zhash.go                         158µs ± 1%       140µs ± 3%   -11.68%  (p=0.008 n=5+5)
      rio/neo/py/sqlite/zhash.go+prefetch128             116µs ± 3%       118µs ± 1%      ~     (p=0.111 n=5+5)
      rio/neo/py/sqlite/zhash.go-P16                    1.90ms ± 0%      1.81ms ± 7%    -4.58%  (p=0.000 n=14+16)
      rio/neo/py(!log)/sqlite/zhash.py                   259µs ± 4%       262µs ± 3%      ~     (p=0.690 n=5+5)
      rio/neo/py(!log)/sqlite/zhash.py-P16              1.89ms ± 1%      2.04ms ± 0%    +7.53%  (p=0.000 n=15+15)
      rio/neo/py(!log)/sqlite/zhash.go                   142µs ± 1%       123µs ± 2%   -13.14%  (p=0.008 n=5+5)
      rio/neo/py(!log)/sqlite/zhash.go+prefetch128       101µs ± 2%       103µs ± 1%    +2.37%  (p=0.008 n=5+5)
      rio/neo/py(!log)/sqlite/zhash.go-P16              1.57ms ± 0%      1.61ms ± 5%      ~     (p=0.089 n=13+16)
      rio/neo/py/sql/zhash.py                            337µs ±43%       298µs ± 3%      ~     (p=0.556 n=5+4)
      rio/neo/py/sql/zhash.py-P16                       2.73ms ± 0%      2.86ms ± 0%    +4.74%  (p=0.000 n=15+15)
      rio/neo/py/sql/zhash.go                            186µs ± 3%       164µs ± 4%   -11.92%  (p=0.008 n=5+5)
      rio/neo/py/sql/zhash.go+prefetch128                145µs ± 2%       147µs ± 2%      ~     (p=0.095 n=5+5)
      rio/neo/py/sql/zhash.go-P16                       2.29ms ± 6%      2.27ms ± 6%    -1.19%  (p=0.002 n=16+16)
      rio/neo/py(!log)/sql/zhash.py                      293µs ± 4%       287µs ± 2%      ~     (p=0.343 n=4+4)
      rio/neo/py(!log)/sql/zhash.py-P16                 2.47ms ± 0%      2.51ms ± 1%    +1.61%  (p=0.000 n=15+15)
      rio/neo/py(!log)/sql/zhash.go                      168µs ± 1%       146µs ± 2%   -13.49%  (p=0.008 n=5+5)
      rio/neo/py(!log)/sql/zhash.go+prefetch128          130µs ± 2%       127µs ± 2%      ~     (p=0.056 n=5+5)
      rio/neo/py(!log)/sql/zhash.go-P16                 2.08ms ± 3%      2.00ms ± 4%    -3.98%  (p=0.009 n=16+16)
      rio/neo/go/fs1/zhash.py                            181µs ± 5%       189µs ± 9%      ~     (p=0.079 n=5+5)
      rio/neo/go/fs1/zhash.py-P16                        714µs ± 6%       711µs ± 3%      ~     (p=0.861 n=15+16)
      rio/neo/go/fs1/zhash.go                           36.9µs ± 3%      41.8µs ± 2%   +13.21%  (p=0.008 n=5+5)
      rio/neo/go/fs1/zhash.go+prefetch128               16.5µs ± 1%      16.8µs ± 3%      ~     (p=0.103 n=5+5)
      rio/neo/go/fs1/zhash.go-P16                        239µs ± 4%       195µs ± 4%   -18.37%  (p=0.000 n=15+13)
      rio/neo/go/fs1(!sha1)/zhash.go                    32.7µs ± 7%      36.3µs ± 2%   +11.07%  (p=0.008 n=5+5)
      rio/neo/go/fs1(!sha1)/zhash.go+prefetch128        13.5µs ± 1%      13.9µs ± 4%      ~     (p=0.056 n=5+5)
      rio/neo/go/fs1(!sha1)/zhash.go-P16                 190µs ± 7%       138µs ±60%   -27.42%  (p=0.000 n=14+16)
      
      name                                          old pystone/s    new pystone/s    delta
      rio/pystone                                         178k ± 2%        180k ± 3%      ~     (p=0.421 n=5+5)
      
      name                                          old time/op      new time/op      delta
      rio/disk/randread/direct/4K-min                   34.0µs ± 1%      34.7µs ± 1%    +2.06%  (p=0.008 n=5+5)
      rio/disk/randread/direct/4K-avg                   92.9µs ± 0%      93.2µs ± 0%    +0.37%  (p=0.024 n=5+5)
      rio/disk/randread/pagecache/4K-min                 221ns ± 0%       441ns ± 0%   +99.37%  (p=0.016 n=4+5)
      rio/disk/randread/pagecache/4K-avg                 637ns ± 0%       872ns ± 1%   +37.01%  (p=0.016 n=4+5)
      
      name                                          old time/object  new time/object  delta
      dataset:wczblk1-8
      rio/fs1/zhash.py                                  22.3µs ± 2%      22.8µs ± 2%    +2.24%  (p=0.048 n=5+5)
      rio/fs1/zhash.py-P16                              51.7µs ±72%      60.3µs ±49%      ~     (p=0.127 n=15+16)
      rio/fs1/zhash.go                                  2.40µs ± 0%      3.80µs ± 0%   +58.33%  (p=0.016 n=5+4)
      rio/fs1/zhash.go+prefetch128                      4.34µs ± 8%      4.10µs ± 2%      ~     (p=0.246 n=5+5)
      rio/fs1/zhash.go-P16                              3.58µs ±24%      6.79µs ±19%   +90.01%  (p=0.000 n=16+14)
      rio/zeo/zhash.py                                   336µs ± 2%       342µs ± 2%    +1.82%  (p=0.040 n=5+5)
      rio/zeo/zhash.py-P16                              1.61ms ±19%      1.64ms ±20%      ~     (p=0.423 n=16+16)
      rio/neo/py/sqlite/zhash.py                         304µs ± 6%       279µs ± 3%    -8.11%  (p=0.016 n=5+5)
      rio/neo/py/sqlite/zhash.py-P16                    2.19ms ± 0%      2.28ms ± 1%    +4.16%  (p=0.000 n=13+15)
      rio/neo/py/sqlite/zhash.go                         248µs ± 1%       147µs ± 2%   -40.70%  (p=0.008 n=5+5)
      rio/neo/py/sqlite/zhash.go+prefetch128             125µs ± 1%       125µs ± 2%      ~     (p=0.651 n=5+5)
      rio/neo/py/sqlite/zhash.go-P16                    1.76ms ±13%      1.73ms ±14%    -1.72%  (p=0.002 n=16+16)
      rio/neo/py(!log)/sqlite/zhash.py                   291µs ± 2%       267µs ± 1%    -8.20%  (p=0.008 n=5+5)
      rio/neo/py(!log)/sqlite/zhash.py-P16              2.01ms ± 2%      2.01ms ± 1%      ~     (p=0.545 n=16+15)
      rio/neo/py(!log)/sqlite/zhash.go                   231µs ± 1%       130µs ± 2%   -43.54%  (p=0.008 n=5+5)
      rio/neo/py(!log)/sqlite/zhash.go+prefetch128       110µs ± 2%       112µs ± 4%      ~     (p=0.222 n=5+5)
      rio/neo/py(!log)/sqlite/zhash.go-P16              1.62ms ± 7%      1.62ms ± 0%    +0.18%  (p=0.029 n=16+11)
      rio/neo/py/sql/zhash.py                            325µs ± 4%       294µs ± 1%    -9.50%  (p=0.029 n=4+4)
      rio/neo/py/sql/zhash.py-P16                       2.88ms ± 1%      2.85ms ± 1%    -0.94%  (p=0.000 n=15+15)
      rio/neo/py/sql/zhash.go                            275µs ± 2%       169µs ± 3%   -38.39%  (p=0.008 n=5+5)
      rio/neo/py/sql/zhash.go+prefetch128                154µs ± 3%       154µs ± 4%      ~     (p=1.000 n=5+5)
      rio/neo/py/sql/zhash.go-P16                       2.30ms ± 8%      2.19ms ±11%    -5.03%  (p=0.009 n=16+16)
      rio/neo/py(!log)/sql/zhash.py                      313µs ± 4%       285µs ± 5%    -8.95%  (p=0.029 n=4+4)
      rio/neo/py(!log)/sql/zhash.py-P16                 2.56ms ± 1%      2.47ms ± 1%    -3.45%  (p=0.000 n=15+14)
      rio/neo/py(!log)/sql/zhash.go                      258µs ± 1%       152µs ± 1%   -41.05%  (p=0.016 n=5+4)
      rio/neo/py(!log)/sql/zhash.go+prefetch128          139µs ± 1%       137µs ± 3%      ~     (p=0.151 n=5+5)
      rio/neo/py(!log)/sql/zhash.go-P16                 2.21ms ± 5%      1.98ms ± 0%   -10.19%  (p=0.000 n=16+11)
      dataset:prod1-1024
      rio/fs1/zhash.py                                  18.9µs ± 1%      18.9µs ± 2%      ~     (p=0.825 n=5+5)
      rio/fs1/zhash.py-P16                              58.0µs ±52%      56.2µs ±32%      ~     (p=0.926 n=16+16)
      rio/fs1/zhash.go                                  1.30µs ± 0%      2.80µs ± 0%  +115.38%  (p=0.016 n=4+5)
      rio/fs1/zhash.go+prefetch128                      2.78µs ±14%      2.70µs ± 0%      ~     (p=0.413 n=5+4)
      rio/fs1/zhash.go-P16                              2.24µs ±16%      6.59µs ±43%  +194.93%  (p=0.000 n=14+16)
      rio/zeo/zhash.py                                   302µs ± 7%       294µs ± 6%      ~     (p=0.310 n=5+5)
      rio/zeo/zhash.py-P16                              1.44ms ±11%      1.46ms ± 3%      ~     (p=0.892 n=15+13)
      rio/neo/py/sqlite/zhash.py                         269µs ± 1%       275µs ± 1%    +2.51%  (p=0.008 n=5+5)
      rio/neo/py/sqlite/zhash.py-P16                    2.19ms ± 0%      2.34ms ± 0%    +6.70%  (p=0.000 n=16+13)
      rio/neo/py/sqlite/zhash.go                         158µs ± 1%       140µs ± 3%   -11.68%  (p=0.008 n=5+5)
      rio/neo/py/sqlite/zhash.go+prefetch128             116µs ± 3%       118µs ± 1%      ~     (p=0.111 n=5+5)
      rio/neo/py/sqlite/zhash.go-P16                    1.90ms ± 0%      1.81ms ± 7%    -4.58%  (p=0.000 n=14+16)
      rio/neo/py(!log)/sqlite/zhash.py                   259µs ± 4%       262µs ± 3%      ~     (p=0.690 n=5+5)
      rio/neo/py(!log)/sqlite/zhash.py-P16              1.89ms ± 1%      2.04ms ± 0%    +7.53%  (p=0.000 n=15+15)
      rio/neo/py(!log)/sqlite/zhash.go                   142µs ± 1%       123µs ± 2%   -13.14%  (p=0.008 n=5+5)
      rio/neo/py(!log)/sqlite/zhash.go+prefetch128       101µs ± 2%       103µs ± 1%    +2.37%  (p=0.008 n=5+5)
      rio/neo/py(!log)/sqlite/zhash.go-P16              1.57ms ± 0%      1.61ms ± 5%      ~     (p=0.089 n=13+16)
      rio/neo/py/sql/zhash.py                            337µs ±43%       298µs ± 3%      ~     (p=0.556 n=5+4)
      rio/neo/py/sql/zhash.py-P16                       2.73ms ± 0%      2.86ms ± 0%    +4.74%  (p=0.000 n=15+15)
      rio/neo/py/sql/zhash.go                            186µs ± 3%       164µs ± 4%   -11.92%  (p=0.008 n=5+5)
      rio/neo/py/sql/zhash.go+prefetch128                145µs ± 2%       147µs ± 2%      ~     (p=0.095 n=5+5)
      rio/neo/py/sql/zhash.go-P16                       2.29ms ± 6%      2.27ms ± 6%    -1.19%  (p=0.002 n=16+16)
      rio/neo/py(!log)/sql/zhash.py                      293µs ± 4%       287µs ± 2%      ~     (p=0.343 n=4+4)
      rio/neo/py(!log)/sql/zhash.py-P16                 2.47ms ± 0%      2.51ms ± 1%    +1.61%  (p=0.000 n=15+15)
      rio/neo/py(!log)/sql/zhash.go                      168µs ± 1%       146µs ± 2%   -13.49%  (p=0.008 n=5+5)
      rio/neo/py(!log)/sql/zhash.go+prefetch128          130µs ± 2%       127µs ± 2%      ~     (p=0.056 n=5+5)
      rio/neo/py(!log)/sql/zhash.go-P16                 2.08ms ± 3%      2.00ms ± 4%    -3.98%  (p=0.009 n=16+16)
      39a77e3b
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