Github user cramja commented on the issue:
https://github.com/apache/incubator-quickstep/pull/109
I ran TPCH 10 on a cloudlab instance. The update is marginally better. Note
that *master* is using splitrows, not columnstores. Also this is queries `01 04
06 09 10 11 12 13 14 15 16 19 22`
|master|splitrow refactor| master - splitrow refactor|
|---|---|---|
| 2244.56| 2227.01| 17.5|
| 482.29| 475.22| 7.1|
| 298.32| 295.05| 3.3|
| 823.28| 822.34| 0.9|
| 1655.41| 1680.74| -25.3|
| 343.62| 360.24| -16.6|
| 566.85| 568.88| -2.0|
| 3189.44| 3104.58| 84.9|
| 315.47| 312.61| 2.9|
| 594.03| 555.04| 39.0|
| 1076.28| 1132.68| -56.4|
| 448.39| 441.66| 6.7|
| 776.47| 777.97| -1.5|
| 12814 |12754|60.39|
**Note the last row is a total**
Comparing it against *Master* on which uses compressed columnstores, I
found:
|master_cs|splitrow refactor| master_cs - splitrow refactor|
|---|---|---|
| 1676.65| 2227.01| -550.4|
| 324.30| 475.22| -150.9|
| 44.78| 295.05| -250.3|
| 692.21| 822.34| -130.1|
| 1522.79| 1680.74| -158.0|
| 325.94| 360.24| -34.3|
| 210.29| 568.88| -358.6|
| 3278.79| 3104.58| 174.2|
| 98.74| 312.61| -213.9|
| 430.47| 555.04| -124.6|
| 977.81| 1132.68| -154.9|
| 113.18| 441.66| -328.5|
| 779.42| 777.97| 1.5|
|10475.37|12754.02|-2278.64|
**Note the last row is a total**
So apparently compression is the way to go here. Though, this is of course
still an improvement on the old splitrow.
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