mapleFU commented on PR #34323:
URL: https://github.com/apache/arrow/pull/34323#issuecomment-1458658020
On my MacOS, after change item processed to data + offset:
```
---------------------------------------------------------------------------------------------------------------------------------------
Benchmark
Time CPU Iterations UserCounters...
---------------------------------------------------------------------------------------------------------------------------------------
BM_PlainEncodingByteArray/max-string-length:8/batch-size:512
3659 ns 2745 ns 247512 bytes_per_second=1.38484G/s
items_per_second=186.507M/s
BM_PlainEncodingByteArray/max-string-length:64/batch-size:512
7606 ns 5272 ns 126288 bytes_per_second=3.2833G/s
items_per_second=97.122M/s
BM_PlainEncodingByteArray/max-string-length:1024/batch-size:512
85815 ns 62674 ns 12375 bytes_per_second=4.04123G/s
items_per_second=8.1692M/s
BM_PlainEncodingByteArray/max-string-length:8/batch-size:2048
13546 ns 12073 ns 51654 bytes_per_second=1.2649G/s
items_per_second=169.637M/s
BM_PlainEncodingByteArray/max-string-length:64/batch-size:2048
62743 ns 47676 ns 14871 bytes_per_second=1.42196G/s
items_per_second=42.9562M/s
BM_PlainEncodingByteArray/max-string-length:1024/batch-size:2048
239524 ns 208403 ns 3173 bytes_per_second=4.79258G/s
items_per_second=9.82709M/s
BM_DeltaLengthEncodingByteArray/max-string-length:8/batch-size:512
6249 ns 6093 ns 114491 bytes_per_second=638.957M/s
items_per_second=84.0366M/s
BM_DeltaLengthEncodingByteArray/max-string-length:64/batch-size:512
8451 ns 7496 ns 98549 bytes_per_second=2.30901G/s
items_per_second=68.3018M/s
BM_DeltaLengthEncodingByteArray/max-string-length:1024/batch-size:512
82397 ns 68114 ns 9823 bytes_per_second=3.7185G/s
items_per_second=7.51683M/s
BM_DeltaLengthEncodingByteArray/max-string-length:8/batch-size:2048
26286 ns 25109 ns 27493 bytes_per_second=622.771M/s
items_per_second=81.5632M/s
BM_DeltaLengthEncodingByteArray/max-string-length:64/batch-size:2048
55228 ns 52277 ns 13039 bytes_per_second=1.29682G/s
items_per_second=39.176M/s
BM_DeltaLengthEncodingByteArray/max-string-length:1024/batch-size:2048
250357 ns 235479 ns 3064 bytes_per_second=4.24152G/s
items_per_second=8.69715M/s
BM_PlainDecodingByteArray/max-string-length:8/batch-size:512
1175 ns 1139 ns 621085 bytes_per_second=3.33662G/s
items_per_second=449.369M/s
BM_PlainDecodingByteArray/max-string-length:64/batch-size:512
1213 ns 1143 ns 612584 bytes_per_second=15.1485G/s
items_per_second=448.102M/s
BM_PlainDecodingByteArray/max-string-length:1024/batch-size:512
1167 ns 1140 ns 617573 bytes_per_second=222.27G/s
items_per_second=449.311M/s
BM_PlainDecodingByteArray/max-string-length:8/batch-size:2048
4436 ns 4248 ns 164415 bytes_per_second=3.59507G/s
items_per_second=482.14M/s
BM_PlainDecodingByteArray/max-string-length:64/batch-size:2048
4248 ns 4204 ns 156082 bytes_per_second=16.1272G/s
items_per_second=487.192M/s
BM_PlainDecodingByteArray/max-string-length:1024/batch-size:2048
13921 ns 13883 ns 49055 bytes_per_second=71.9418G/s
items_per_second=147.515M/s
BM_DeltaLengthDecodingByteArray/max-string-length:8/batch-size:512
1965 ns 1959 ns 356100 bytes_per_second=1.941G/s
items_per_second=261.41M/s
BM_DeltaLengthDecodingByteArray/max-string-length:64/batch-size:512
5069 ns 5056 ns 139135 bytes_per_second=3.42333G/s
items_per_second=101.264M/s
BM_DeltaLengthDecodingByteArray/max-string-length:1024/batch-size:512
84992 ns 82547 ns 8386 bytes_per_second=3.06834G/s
items_per_second=6.20254M/s
BM_DeltaLengthDecodingByteArray/max-string-length:8/batch-size:2048
5911 ns 5891 ns 119511 bytes_per_second=2.59217G/s
items_per_second=347.639M/s
BM_DeltaLengthDecodingByteArray/max-string-length:64/batch-size:2048
26904 ns 26252 ns 26404 bytes_per_second=2.58242G/s
items_per_second=78.0131M/s
BM_DeltaLengthDecodingByteArray/max-string-length:1024/batch-size:2048
325519 ns 315624 ns 2253 bytes_per_second=3.16449G/s
items_per_second=6.48873M/s
BM_PlainDecodingSpacedByteArray/max-string-length:8/batch-size:512
1177 ns 1168 ns 607813 bytes_per_second=3.2343G/s
items_per_second=438.381M/s null_percent=2
BM_PlainDecodingSpacedByteArray/max-string-length:64/batch-size:512
1257 ns 1187 ns 594091 bytes_per_second=14.3557G/s
items_per_second=431.357M/s null_percent=2
BM_PlainDecodingSpacedByteArray/max-string-length:1024/batch-size:512
1182 ns 1174 ns 594813 bytes_per_second=212.096G/s
items_per_second=436.195M/s null_percent=2
BM_PlainDecodingSpacedByteArray/max-string-length:8/batch-size:2048
4985 ns 4728 ns 149907 bytes_per_second=3.20624G/s
items_per_second=433.189M/s null_percent=2
BM_PlainDecodingSpacedByteArray/max-string-length:64/batch-size:2048
4612 ns 4604 ns 150540 bytes_per_second=14.4954G/s
items_per_second=444.8M/s null_percent=2
BM_PlainDecodingSpacedByteArray/max-string-length:1024/batch-size:2048
13125 ns 13113 ns 52987 bytes_per_second=74.9127G/s
items_per_second=156.179M/s null_percent=2
BM_DeltaLengthDecodingSpacedByteArray/max-string-length:8/batch-size:512
1647 ns 1647 ns 418708 bytes_per_second=2.29284G/s
items_per_second=310.775M/s null_percent=2
BM_DeltaLengthDecodingSpacedByteArray/max-string-length:64/batch-size:512
4548 ns 4547 ns 153156 bytes_per_second=3.74715G/s
items_per_second=112.594M/s null_percent=2
BM_DeltaLengthDecodingSpacedByteArray/max-string-length:1024/batch-size:512
55928 ns 55923 ns 12517 bytes_per_second=4.45176G/s
items_per_second=9.15545M/s null_percent=2
BM_DeltaLengthDecodingSpacedByteArray/max-string-length:8/batch-size:2048
5834 ns 5833 ns 120996 bytes_per_second=2.59892G/s
items_per_second=351.135M/s null_percent=2
BM_DeltaLengthDecodingSpacedByteArray/max-string-length:64/batch-size:2048
17598 ns 17568 ns 39706 bytes_per_second=3.79911G/s
items_per_second=116.578M/s null_percent=2
BM_DeltaLengthDecodingSpacedByteArray/max-string-length:1024/batch-size:2048
220807 ns 220793 ns 3181 bytes_per_second=4.44916G/s
items_per_second=9.27566M/s null_percent=2
BM_DictDecodingByteArray/max-string-length:8/batch-size:512
3380 ns 3380 ns 206645 bytes_per_second=1.12489G/s
items_per_second=151.498M/s
BM_DictDecodingByteArray/max-string-length:64/batch-size:512
4823 ns 4822 ns 145563 bytes_per_second=3.58935G/s
items_per_second=106.175M/s
BM_DictDecodingByteArray/max-string-length:1024/batch-size:512
32011 ns 31901 ns 21840 bytes_per_second=7.93962G/s
items_per_second=16.0497M/s
BM_DictDecodingByteArray/max-string-length:8/batch-size:2048
10664 ns 10618 ns 65184 bytes_per_second=1.43825G/s
items_per_second=192.886M/s
BM_DictDecodingByteArray/max-string-length:64/batch-size:2048
29204 ns 29138 ns 23638 bytes_per_second=2.32661G/s
items_per_second=70.2853M/s
BM_DictDecodingByteArray/max-string-length:1024/batch-size:2048
139016 ns 138991 ns 5120 bytes_per_second=7.18603G/s
items_per_second=14.7348M/s
```
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