pitrou commented on PR #14509:
URL: https://github.com/apache/arrow/pull/14509#issuecomment-1342905502
I get the following benchmark numbers:
* before:
```
-------------------------------------------------------------------------------------------------------------------
Benchmark Time
CPU Iterations UserCounters...
-------------------------------------------------------------------------------------------------------------------
ColumnReaderSkipInt32/Repetition:0/BatchSize:100 2256949 ns
2256574 ns 310 bytes_per_second=2.1131G/s
ColumnReaderSkipInt32/Repetition:0/BatchSize:1000 322274 ns
322302 ns 2147 bytes_per_second=14.7947G/s
ColumnReaderSkipInt32/Repetition:0/BatchSize:10000 123075 ns
123135 ns 5695 bytes_per_second=38.7247G/s
ColumnReaderSkipInt32/Repetition:0/BatchSize:100000 34654 ns
34707 ns 19814 bytes_per_second=137.388G/s
ColumnReaderSkipInt32/Repetition:1/BatchSize:100 4483059 ns
4482271 ns 159 bytes_per_second=579.976M/s
ColumnReaderSkipInt32/Repetition:1/BatchSize:1000 974701 ns
974606 ns 719 bytes_per_second=2.60483G/s
ColumnReaderSkipInt32/Repetition:1/BatchSize:10000 630965 ns
630913 ns 1111 bytes_per_second=4.02382G/s
ColumnReaderSkipInt32/Repetition:1/BatchSize:100000 191333 ns
191349 ns 3553 bytes_per_second=13.2672G/s
ColumnReaderSkipInt32/Repetition:2/BatchSize:100 5919031 ns
5917853 ns 119 bytes_per_second=465.768M/s
ColumnReaderSkipInt32/Repetition:2/BatchSize:1000 1422720 ns
1422501 ns 488 bytes_per_second=1.89226G/s
ColumnReaderSkipInt32/Repetition:2/BatchSize:10000 1008342 ns
1008178 ns 698 bytes_per_second=2.66991G/s
ColumnReaderSkipInt32/Repetition:2/BatchSize:100000 306069 ns
306087 ns 2281 bytes_per_second=8.79405G/s
```
* after:
```
ColumnReaderSkipInt32/Repetition:0/BatchSize:100 246589 ns
246512 ns 2869 bytes_per_second=19.3434G/s
ColumnReaderSkipInt32/Repetition:0/BatchSize:1000 114571 ns
114636 ns 6122 bytes_per_second=41.5957G/s
ColumnReaderSkipInt32/Repetition:0/BatchSize:10000 98790 ns
98844 ns 7101 bytes_per_second=48.2414G/s
ColumnReaderSkipInt32/Repetition:0/BatchSize:100000 32585 ns
32662 ns 22074 bytes_per_second=145.992G/s
ColumnReaderSkipInt32/Repetition:1/BatchSize:100 1716748 ns
1716514 ns 408 bytes_per_second=1.47897G/s
ColumnReaderSkipInt32/Repetition:1/BatchSize:1000 644526 ns
644500 ns 1091 bytes_per_second=3.93899G/s
ColumnReaderSkipInt32/Repetition:1/BatchSize:10000 567605 ns
567578 ns 1241 bytes_per_second=4.47283G/s
ColumnReaderSkipInt32/Repetition:1/BatchSize:100000 180075 ns
180121 ns 3862 bytes_per_second=14.0943G/s
ColumnReaderSkipInt32/Repetition:2/BatchSize:100 2880737 ns
2880209 ns 243 bytes_per_second=956.995M/s
ColumnReaderSkipInt32/Repetition:2/BatchSize:1000 1040618 ns
1040539 ns 676 bytes_per_second=2.58687G/s
ColumnReaderSkipInt32/Repetition:2/BatchSize:10000 916319 ns
916171 ns 767 bytes_per_second=2.93803G/s
ColumnReaderSkipInt32/Repetition:2/BatchSize:100000 288829 ns
288867 ns 2418 bytes_per_second=9.31826G/s
```
Nice improvement!
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