taiyang-li commented on PR #1375:
URL: https://github.com/apache/orc/pull/1375#issuecomment-1756715851
@wpleonardo I tried, but still find no improvement
```
orc file(snappy + unaligned) + avx512
0 rows in set. Elapsed: 3.478 sec. Processed 1.20 million rows, 539.37 MB
(345.98 thousand rows/s., 155.08 MB/s.)
0 rows in set. Elapsed: 3.424 sec. Processed 1.20 million rows, 539.37 MB
(351.44 thousand rows/s., 157.53 MB/s.)
0 rows in set. Elapsed: 3.444 sec. Processed 1.20 million rows, 539.37 MB
(349.44 thousand rows/s., 156.63 MB/s.)
orc file (snappy + unaligned) + none
0 rows in set. Elapsed: 3.362 sec. Processed 1.20 million rows, 539.37 MB
(357.89 thousand rows/s., 160.42 MB/s.)
0 rows in set. Elapsed: 3.535 sec. Processed 1.20 million rows, 539.37 MB
(340.43 thousand rows/s., 152.59 MB/s.)
0 rows in set. Elapsed: 3.370 sec. Processed 1.20 million rows, 539.37 MB
(357.08 thousand rows/s., 160.06 MB/s.)
orc file (lz4 + unaligned) + avx512
0 rows in set. Elapsed: 3.075 sec. Processed 1.20 million rows, 1.90 GB
(391.26 thousand rows/s., 618.31 MB/s.)
0 rows in set. Elapsed: 3.082 sec. Processed 1.20 million rows, 1.90 GB
(390.46 thousand rows/s., 617.05 MB/s.)
0 rows in set. Elapsed: 3.014 sec. Processed 1.20 million rows, 1.90 GB
(399.18 thousand rows/s., 630.82 MB/s.)
orc file (lz4 + unaligned) + none
rows in set. Elapsed: 2.973 sec. Processed 1.20 million rows, 1.90 GB
(404.76 thousand rows/s., 639.64 MB/s.)
0 rows in set. Elapsed: 3.070 sec. Processed 1.20 million rows, 1.90 GB
(391.90 thousand rows/s., 619.32 MB/s.)
0 rows in set. Elapsed: 2.903 sec. Processed 1.20 million rows, 1.90 GB
(414.51 thousand rows/s., 655.05 MB/s.)
```
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