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spark-instrumented-optimizer/sql/core/benchmarks/CompressionSchemeBenchmark-jdk11-results.txt
Chao Sun a6d6ea3efe [SPARK-32802][SQL] Avoid using SpecificInternalRow in RunLengthEncoding#Encoder 
### What changes were proposed in this pull request?

Currently `RunLengthEncoding#Encoder` uses `SpecificInternalRow` as a holder for the current value when calculating compression stats and doing the actual compression. It calls `ColumnType.copyField` and `ColumnType.getField` on the internal row which incurs extra cost comparing to directly operating on the internal type. This proposes to replace the `SpecificInternalRow` with `T#InternalType` to avoid the extra cost.

### Why are the changes needed?

Operating on `SpecificInternalRow` carries certain cost and negatively impact performance when using `RunLengthEncoding` for compression.

With the change I see some improvements through `CompressionSchemeBenchmark`:

```diff
 Intel(R) Core(TM) i9-9880H CPU  2.30GHz
 BOOLEAN Encode:                           Best Time(ms)   Avg Time(ms)   Stdev(ms)    Rate(M/s)   Per Row(ns)   Relative
 ------------------------------------------------------------------------------------------------------------------------
-PassThrough(1.000)                                    1              1           0      51957.0           0.0       1.0X
-RunLengthEncoding(2.502)                            549            555           9        122.2           8.2       0.0X
-BooleanBitSet(0.125)                                296            301           3        226.6           4.4       0.0X
+PassThrough(1.000)                                    2              2           0      42985.4           0.0       1.0X
+RunLengthEncoding(2.517)                            487            500          10        137.7           7.3       0.0X
+BooleanBitSet(0.125)                                348            353           4        192.8           5.2       0.0X

 OpenJDK 64-Bit Server VM 11.0.8+10-LTS on Mac OS X 10.15.5
 Intel(R) Core(TM) i9-9880H CPU  2.30GHz
 SHORT Encode (Lower Skew):                Best Time(ms)   Avg Time(ms)   Stdev(ms)    Rate(M/s)   Per Row(ns)   Relative
 ------------------------------------------------------------------------------------------------------------------------
-PassThrough(1.000)                                    3              3           0      22779.9           0.0       1.0X
-RunLengthEncoding(1.520)                           1186           1192           9         56.6          17.7       0.0X
+PassThrough(1.000)                                    3              4           0      21216.6           0.0       1.0X
+RunLengthEncoding(1.493)                            882            931          50         76.1          13.1       0.0X

 OpenJDK 64-Bit Server VM 11.0.8+10-LTS on Mac OS X 10.15.5
 Intel(R) Core(TM) i9-9880H CPU  2.30GHz
 SHORT Encode (Higher Skew):               Best Time(ms)   Avg Time(ms)   Stdev(ms)    Rate(M/s)   Per Row(ns)   Relative
 ------------------------------------------------------------------------------------------------------------------------
-PassThrough(1.000)                                    3              4           0      21352.2           0.0       1.0X
-RunLengthEncoding(2.009)                           1173           1175           3         57.2          17.5       0.0X
+PassThrough(1.000)                                    3              3           0      22388.6           0.0       1.0X
+RunLengthEncoding(2.015)                            924            941          23         72.6          13.8       0.0X

 OpenJDK 64-Bit Server VM 11.0.8+10-LTS on Mac OS X 10.15.5
 Intel(R) Core(TM) i9-9880H CPU  2.30GHz
 INT Encode (Lower Skew):                  Best Time(ms)   Avg Time(ms)   Stdev(ms)    Rate(M/s)   Per Row(ns)   Relative
 ------------------------------------------------------------------------------------------------------------------------
-PassThrough(1.000)                                    9             10           1       7410.1           0.1       1.0X
-RunLengthEncoding(1.000)                           1499           1502           4         44.8          22.3       0.0X
-DictionaryEncoding(0.500)                           621            630          11        108.0           9.3       0.0X
-IntDelta(0.250)                                     134            149          10        502.0           2.0       0.1X
+PassThrough(1.000)                                    9             10           1       7575.9           0.1       1.0X
+RunLengthEncoding(1.002)                            952            966          12         70.5          14.2       0.0X
+DictionaryEncoding(0.500)                           561            567           6        119.7           8.4       0.0X
+IntDelta(0.250)                                     129            134           3        521.9           1.9       0.1X

 OpenJDK 64-Bit Server VM 11.0.8+10-LTS on Mac OS X 10.15.5
 Intel(R) Core(TM) i9-9880H CPU  2.30GHz
 INT Encode (Higher Skew):                 Best Time(ms)   Avg Time(ms)   Stdev(ms)    Rate(M/s)   Per Row(ns)   Relative
 ------------------------------------------------------------------------------------------------------------------------
-PassThrough(1.000)                                    9             10           1       7668.3           0.1       1.0X
-RunLengthEncoding(1.332)                           1561           1685         175         43.0          23.3       0.0X
-DictionaryEncoding(0.501)                           616            642          21        108.9           9.2       0.0X
-IntDelta(0.250)                                     126            131           2        533.4           1.9       0.1X
+PassThrough(1.000)                                    9             10           1       7494.1           0.1       1.0X
+RunLengthEncoding(1.336)                            974            987          13         68.9          14.5       0.0X
+DictionaryEncoding(0.501)                           709            719          10         94.6          10.6       0.0X
+IntDelta(0.250)                                     127            132           4        528.4           1.9       0.1X

 OpenJDK 64-Bit Server VM 11.0.8+10-LTS on Mac OS X 10.15.5
 Intel(R) Core(TM) i9-9880H CPU  2.30GHz
 LONG Encode (Lower Skew):                 Best Time(ms)   Avg Time(ms)   Stdev(ms)    Rate(M/s)   Per Row(ns)   Relative
 ------------------------------------------------------------------------------------------------------------------------
-PassThrough(1.000)                                   18             19           1       3803.0           0.3       1.0X
-RunLengthEncoding(0.754)                           1526           1540          20         44.0          22.7       0.0X
-DictionaryEncoding(0.250)                           735            759          33         91.3          11.0       0.0X
-LongDelta(0.125)                                    126            129           2        530.8           1.9       0.1X
+PassThrough(1.000)                                   19             21           1       3543.5           0.3       1.0X
+RunLengthEncoding(0.747)                           1049           1058          12         63.9          15.6       0.0X
+DictionaryEncoding(0.250)                           620            634          17        108.2           9.2       0.0X
+LongDelta(0.125)                                    129            132           2        520.1           1.9       0.1X

 OpenJDK 64-Bit Server VM 11.0.8+10-LTS on Mac OS X 10.15.5
 Intel(R) Core(TM) i9-9880H CPU  2.30GHz
 LONG Encode (Higher Skew):                Best Time(ms)   Avg Time(ms)   Stdev(ms)    Rate(M/s)   Per Row(ns)   Relative
 ------------------------------------------------------------------------------------------------------------------------
-PassThrough(1.000)                                   18             20           1       3705.4           0.3       1.0X
-RunLengthEncoding(1.002)                           1665           1669           6         40.3          24.8       0.0X
-DictionaryEncoding(0.251)                           890            901          11         75.4          13.3       0.0X
-LongDelta(0.125)                                    125            130           3        537.2           1.9       0.1X
+PassThrough(1.000)                                   18             20           2       3726.8           0.3       1.0X
+RunLengthEncoding(0.999)                           1076           1077           2         62.4          16.0       0.0X
+DictionaryEncoding(0.251)                           904            919          19         74.3          13.5       0.0X
+LongDelta(0.125)                                    125            131           4        536.5           1.9       0.1X

 OpenJDK 64-Bit Server VM 11.0.8+10-LTS on Mac OS X 10.15.5
 Intel(R) Core(TM) i9-9880H CPU  2.30GHz
 STRING Encode:                            Best Time(ms)   Avg Time(ms)   Stdev(ms)    Rate(M/s)   Per Row(ns)   Relative
 ------------------------------------------------------------------------------------------------------------------------
-PassThrough(1.000)                                   27             30           2       2497.1           0.4       1.0X
-RunLengthEncoding(0.892)                           3443           3587         204         19.5          51.3       0.0X
-DictionaryEncoding(0.167)                          2286           2290           6         29.4          34.1       0.0X
+PassThrough(1.000)                                   28             31           2       2430.2           0.4       1.0X
+RunLengthEncoding(0.889)                           1798           1800           3         37.3          26.8       0.0X
+DictionaryEncoding(0.167)                          1956           1959           4         34.3          29.1       0.0X
```

In the above diff, new results are with changes in this PR. It can be seen that encoding performance has improved quite a lot especially for string type.

### Does this PR introduce _any_ user-facing change?

No.

### How was this patch tested?

Relies on existing unit tests.

Closes #29654 from sunchao/SPARK-32802.

Authored-by: Chao Sun <sunchao@apache.org>
Signed-off-by: Dongjoon Hyun <dongjoon@apache.org>
2020-09-12 22:19:30 -07:00

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================================================================================================
Compression Scheme Benchmark
================================================================================================
OpenJDK 64-Bit Server VM 11.0.8+10-LTS on Mac OS X 10.15.5
Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
BOOLEAN Encode: Best Time(ms) Avg Time(ms) Stdev(ms) Rate(M/s) Per Row(ns) Relative
------------------------------------------------------------------------------------------------------------------------
PassThrough(1.000) 1 1 0 53450.1 0.0 1.0X
RunLengthEncoding(2.496) 533 545 10 125.8 7.9 0.0X
BooleanBitSet(0.125) 287 293 6 234.2 4.3 0.0X
OpenJDK 64-Bit Server VM 11.0.8+10-LTS on Mac OS X 10.15.5
Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
BOOLEAN Decode: Best Time(ms) Avg Time(ms) Stdev(ms) Rate(M/s) Per Row(ns) Relative
------------------------------------------------------------------------------------------------------------------------
PassThrough 105 108 2 638.6 1.6 1.0X
RunLengthEncoding 490 497 6 136.8 7.3 0.2X
BooleanBitSet 911 914 4 73.7 13.6 0.1X
OpenJDK 64-Bit Server VM 11.0.8+10-LTS on Mac OS X 10.15.5
Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
SHORT Encode (Lower Skew): Best Time(ms) Avg Time(ms) Stdev(ms) Rate(M/s) Per Row(ns) Relative
------------------------------------------------------------------------------------------------------------------------
PassThrough(1.000) 3 3 0 20673.0 0.0 1.0X
RunLengthEncoding(1.495) 750 757 9 89.5 11.2 0.0X
OpenJDK 64-Bit Server VM 11.0.8+10-LTS on Mac OS X 10.15.5
Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
SHORT Decode (Lower Skew): Best Time(ms) Avg Time(ms) Stdev(ms) Rate(M/s) Per Row(ns) Relative
------------------------------------------------------------------------------------------------------------------------
PassThrough 637 647 7 105.3 9.5 1.0X
RunLengthEncoding 1056 1069 17 63.5 15.7 0.6X
OpenJDK 64-Bit Server VM 11.0.8+10-LTS on Mac OS X 10.15.5
Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
SHORT Encode (Higher Skew): Best Time(ms) Avg Time(ms) Stdev(ms) Rate(M/s) Per Row(ns) Relative
------------------------------------------------------------------------------------------------------------------------
PassThrough(1.000) 3 3 0 21332.2 0.0 1.0X
RunLengthEncoding(2.004) 768 783 15 87.4 11.4 0.0X
OpenJDK 64-Bit Server VM 11.0.8+10-LTS on Mac OS X 10.15.5
Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
SHORT Decode (Higher Skew): Best Time(ms) Avg Time(ms) Stdev(ms) Rate(M/s) Per Row(ns) Relative
------------------------------------------------------------------------------------------------------------------------
PassThrough 640 643 4 104.9 9.5 1.0X
RunLengthEncoding 1073 1078 6 62.5 16.0 0.6X
OpenJDK 64-Bit Server VM 11.0.8+10-LTS on Mac OS X 10.15.5
Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
INT Encode (Lower Skew): Best Time(ms) Avg Time(ms) Stdev(ms) Rate(M/s) Per Row(ns) Relative
------------------------------------------------------------------------------------------------------------------------
PassThrough(1.000) 9 9 1 7640.9 0.1 1.0X
RunLengthEncoding(1.003) 882 883 2 76.1 13.1 0.0X
DictionaryEncoding(0.500) 587 624 33 114.3 8.7 0.0X
IntDelta(0.250) 122 127 5 549.8 1.8 0.1X
OpenJDK 64-Bit Server VM 11.0.8+10-LTS on Mac OS X 10.15.5
Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
INT Decode (Lower Skew): Best Time(ms) Avg Time(ms) Stdev(ms) Rate(M/s) Per Row(ns) Relative
------------------------------------------------------------------------------------------------------------------------
PassThrough 684 709 27 98.1 10.2 1.0X
RunLengthEncoding 1068 1075 10 62.8 15.9 0.6X
DictionaryEncoding 517 526 6 129.8 7.7 1.3X
IntDelta 541 545 4 124.0 8.1 1.3X
OpenJDK 64-Bit Server VM 11.0.8+10-LTS on Mac OS X 10.15.5
Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
INT Encode (Higher Skew): Best Time(ms) Avg Time(ms) Stdev(ms) Rate(M/s) Per Row(ns) Relative
------------------------------------------------------------------------------------------------------------------------
PassThrough(1.000) 9 10 1 7475.0 0.1 1.0X
RunLengthEncoding(1.339) 908 922 12 73.9 13.5 0.0X
DictionaryEncoding(0.501) 629 652 16 106.6 9.4 0.0X
IntDelta(0.250) 124 128 3 542.5 1.8 0.1X
OpenJDK 64-Bit Server VM 11.0.8+10-LTS on Mac OS X 10.15.5
Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
INT Decode (Higher Skew): Best Time(ms) Avg Time(ms) Stdev(ms) Rate(M/s) Per Row(ns) Relative
------------------------------------------------------------------------------------------------------------------------
PassThrough 778 783 8 86.3 11.6 1.0X
RunLengthEncoding 1217 1217 1 55.2 18.1 0.6X
DictionaryEncoding 690 704 12 97.2 10.3 1.1X
IntDelta 691 699 13 97.1 10.3 1.1X
OpenJDK 64-Bit Server VM 11.0.8+10-LTS on Mac OS X 10.15.5
Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
LONG Encode (Lower Skew): Best Time(ms) Avg Time(ms) Stdev(ms) Rate(M/s) Per Row(ns) Relative
------------------------------------------------------------------------------------------------------------------------
PassThrough(1.000) 18 19 1 3772.0 0.3 1.0X
RunLengthEncoding(0.750) 985 987 2 68.1 14.7 0.0X
DictionaryEncoding(0.250) 665 668 4 100.9 9.9 0.0X
LongDelta(0.125) 124 128 2 539.4 1.9 0.1X
OpenJDK 64-Bit Server VM 11.0.8+10-LTS on Mac OS X 10.15.5
Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
LONG Decode (Lower Skew): Best Time(ms) Avg Time(ms) Stdev(ms) Rate(M/s) Per Row(ns) Relative
------------------------------------------------------------------------------------------------------------------------
PassThrough 837 841 7 80.2 12.5 1.0X
RunLengthEncoding 1177 1180 4 57.0 17.5 0.7X
DictionaryEncoding 741 747 7 90.6 11.0 1.1X
LongDelta 509 520 13 131.8 7.6 1.6X
OpenJDK 64-Bit Server VM 11.0.8+10-LTS on Mac OS X 10.15.5
Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
LONG Encode (Higher Skew): Best Time(ms) Avg Time(ms) Stdev(ms) Rate(M/s) Per Row(ns) Relative
------------------------------------------------------------------------------------------------------------------------
PassThrough(1.000) 18 20 1 3769.4 0.3 1.0X
RunLengthEncoding(1.005) 1016 1054 54 66.1 15.1 0.0X
DictionaryEncoding(0.251) 923 928 4 72.7 13.8 0.0X
LongDelta(0.125) 125 127 2 538.8 1.9 0.1X
OpenJDK 64-Bit Server VM 11.0.8+10-LTS on Mac OS X 10.15.5
Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
LONG Decode (Higher Skew): Best Time(ms) Avg Time(ms) Stdev(ms) Rate(M/s) Per Row(ns) Relative
------------------------------------------------------------------------------------------------------------------------
PassThrough 842 846 5 79.7 12.5 1.0X
RunLengthEncoding 1222 1264 59 54.9 18.2 0.7X
DictionaryEncoding 757 776 20 88.7 11.3 1.1X
LongDelta 681 686 4 98.5 10.2 1.2X
OpenJDK 64-Bit Server VM 11.0.8+10-LTS on Mac OS X 10.15.5
Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
STRING Encode: Best Time(ms) Avg Time(ms) Stdev(ms) Rate(M/s) Per Row(ns) Relative
------------------------------------------------------------------------------------------------------------------------
PassThrough(1.000) 27 29 2 2510.4 0.4 1.0X
RunLengthEncoding(0.888) 1651 1663 18 40.7 24.6 0.0X
DictionaryEncoding(0.167) 1851 1863 17 36.3 27.6 0.0X
OpenJDK 64-Bit Server VM 11.0.8+10-LTS on Mac OS X 10.15.5
Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
STRING Decode: Best Time(ms) Avg Time(ms) Stdev(ms) Rate(M/s) Per Row(ns) Relative
------------------------------------------------------------------------------------------------------------------------
PassThrough 1485 1495 15 45.2 22.1 1.0X
RunLengthEncoding 2010 2066 80 33.4 30.0 0.7X
DictionaryEncoding 1788 1790 4 37.5 26.6 0.8X
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