mapleFU commented on PR #37874:
URL: https://github.com/apache/arrow/pull/37874#issuecomment-1735693067
On MacOS, O2:
After
```c++
-----------------------------------------------------------------------------------------------------------------------------------------------
Benchmark
Time CPU Iterations UserCounters...
-----------------------------------------------------------------------------------------------------------------------------------------------
BM_DeltaDecodingByteArray/max-string-length:8/batch-size:512/prefixed-percent:10
2897 ns 2480 ns 278862 bytes_per_second=776.775M/s
compression_ratio=0.682207 items_per_second=206.449M/s
BM_DeltaDecodingByteArray/max-string-length:8/batch-size:512/prefixed-percent:90
4697 ns 4053 ns 170341 bytes_per_second=476.521M/s
compression_ratio=0.750368 items_per_second=126.336M/s
BM_DeltaDecodingByteArray/max-string-length:8/batch-size:512/prefixed-percent:99
4227 ns 4026 ns 169319 bytes_per_second=484.23M/s
compression_ratio=0.76386 items_per_second=127.186M/s
BM_DeltaDecodingByteArray/max-string-length:8/batch-size:2048/prefixed-percent:10
9451 ns 9139 ns 76633 bytes_per_second=857.136M/s
compression_ratio=0.696438 items_per_second=224.091M/s
BM_DeltaDecodingByteArray/max-string-length:8/batch-size:2048/prefixed-percent:90
18922 ns 18226 ns 37657 bytes_per_second=429.85M/s
compression_ratio=0.755143 items_per_second=112.367M/s
BM_DeltaDecodingByteArray/max-string-length:8/batch-size:2048/prefixed-percent:99
20366 ns 19756 ns 37032 bytes_per_second=395.786M/s
compression_ratio=0.763686 items_per_second=103.664M/s
BM_DeltaDecodingByteArray/max-string-length:64/batch-size:512/prefixed-percent:10
2664 ns 2582 ns 268620 bytes_per_second=5.67942G/s
compression_ratio=0.919864 items_per_second=198.316M/s
BM_DeltaDecodingByteArray/max-string-length:64/batch-size:512/prefixed-percent:90
5954 ns 5880 ns 117851 bytes_per_second=2.55873G/s
compression_ratio=1.18241 items_per_second=87.0792M/s
BM_DeltaDecodingByteArray/max-string-length:64/batch-size:512/prefixed-percent:99
6598 ns 6558 ns 106798 bytes_per_second=2.3345G/s
compression_ratio=1.26081 items_per_second=78.0755M/s
BM_DeltaDecodingByteArray/max-string-length:64/batch-size:2048/prefixed-percent:10
11035 ns 10142 ns 70568 bytes_per_second=6.05563G/s
compression_ratio=0.921508 items_per_second=201.927M/s
BM_DeltaDecodingByteArray/max-string-length:64/batch-size:2048/prefixed-percent:90
42009 ns 41723 ns 16561 bytes_per_second=1.44518G/s
compression_ratio=1.19215 items_per_second=49.0853M/s
BM_DeltaDecodingByteArray/max-string-length:64/batch-size:2048/prefixed-percent:99
46307 ns 46095 ns 14958 bytes_per_second=1.33228G/s
compression_ratio=1.24502 items_per_second=44.4299M/s
BM_DeltaDecodingByteArray/max-string-length:1024/batch-size:512/prefixed-percent:10
2777 ns 2768 ns 256328 bytes_per_second=85.4187G/s
compression_ratio=1.01749 items_per_second=184.946M/s
BM_DeltaDecodingByteArray/max-string-length:1024/batch-size:512/prefixed-percent:90
9511 ns 9493 ns 74403 bytes_per_second=25.7074G/s
compression_ratio=1.42469 items_per_second=53.9318M/s
BM_DeltaDecodingByteArray/max-string-length:1024/batch-size:512/prefixed-percent:99
9946 ns 9884 ns 71245 bytes_per_second=24.6859G/s
compression_ratio=1.49377 items_per_second=51.7986M/s
BM_DeltaDecodingByteArray/max-string-length:1024/batch-size:2048/prefixed-percent:10
14688 ns 14221 ns 55430 bytes_per_second=66.9538G/s
compression_ratio=1.02442 items_per_second=144.015M/s
BM_DeltaDecodingByteArray/max-string-length:1024/batch-size:2048/prefixed-percent:90
50637 ns 48877 ns 14377 bytes_per_second=19.6459G/s
compression_ratio=1.39937 items_per_second=41.901M/s
BM_DeltaDecodingByteArray/max-string-length:1024/batch-size:2048/prefixed-percent:99
55996 ns 53017 ns 12490 bytes_per_second=18.1111G/s
compression_ratio=1.47214 items_per_second=38.6291M/s
```
Before:
```
-----------------------------------------------------------------------------------------------------------------------------------------------
Benchmark
Time CPU Iterations UserCounters...
-----------------------------------------------------------------------------------------------------------------------------------------------
BM_DeltaDecodingByteArray/max-string-length:8/batch-size:512/prefixed-percent:10
5387 ns 5382 ns 132195 bytes_per_second=357.912M/s
compression_ratio=0.682207 items_per_second=95.125M/s
BM_DeltaDecodingByteArray/max-string-length:8/batch-size:512/prefixed-percent:90
5466 ns 5444 ns 131143 bytes_per_second=354.738M/s
compression_ratio=0.750368 items_per_second=94.0486M/s
BM_DeltaDecodingByteArray/max-string-length:8/batch-size:512/prefixed-percent:99
5537 ns 5466 ns 127702 bytes_per_second=356.633M/s
compression_ratio=0.76386 items_per_second=93.6723M/s
BM_DeltaDecodingByteArray/max-string-length:8/batch-size:2048/prefixed-percent:10
24666 ns 24609 ns 28099 bytes_per_second=318.311M/s
compression_ratio=0.696438 items_per_second=83.2199M/s
BM_DeltaDecodingByteArray/max-string-length:8/batch-size:2048/prefixed-percent:90
29571 ns 29047 ns 25804 bytes_per_second=269.714M/s
compression_ratio=0.755143 items_per_second=70.5059M/s
BM_DeltaDecodingByteArray/max-string-length:8/batch-size:2048/prefixed-percent:99
32941 ns 29160 ns 24932 bytes_per_second=268.147M/s
compression_ratio=0.763686 items_per_second=70.2331M/s
BM_DeltaDecodingByteArray/max-string-length:64/batch-size:512/prefixed-percent:10
8372 ns 6956 ns 99016 bytes_per_second=2.10787G/s
compression_ratio=0.919864 items_per_second=73.6036M/s
BM_DeltaDecodingByteArray/max-string-length:64/batch-size:512/prefixed-percent:90
7475 ns 7327 ns 94582 bytes_per_second=2.05325G/s
compression_ratio=1.18241 items_per_second=69.8766M/s
BM_DeltaDecodingByteArray/max-string-length:64/batch-size:512/prefixed-percent:99
7661 ns 7495 ns 93635 bytes_per_second=2.04252G/s
compression_ratio=1.26081 items_per_second=68.3106M/s
BM_DeltaDecodingByteArray/max-string-length:64/batch-size:2048/prefixed-percent:10
38223 ns 36070 ns 19247 bytes_per_second=1.70273G/s
compression_ratio=0.921508 items_per_second=56.7781M/s
BM_DeltaDecodingByteArray/max-string-length:64/batch-size:2048/prefixed-percent:90
47612 ns 47446 ns 14260 bytes_per_second=1.27086G/s
compression_ratio=1.19215 items_per_second=43.1647M/s
BM_DeltaDecodingByteArray/max-string-length:64/batch-size:2048/prefixed-percent:99
48294 ns 47983 ns 14478 bytes_per_second=1.27985G/s
compression_ratio=1.24502 items_per_second=42.6816M/s
BM_DeltaDecodingByteArray/max-string-length:1024/batch-size:512/prefixed-percent:10
11383 ns 11281 ns 61991 bytes_per_second=20.9626G/s
compression_ratio=1.01749 items_per_second=45.3876M/s
BM_DeltaDecodingByteArray/max-string-length:1024/batch-size:512/prefixed-percent:90
11134 ns 11107 ns 63670 bytes_per_second=21.9732G/s
compression_ratio=1.42469 items_per_second=46.0979M/s
BM_DeltaDecodingByteArray/max-string-length:1024/batch-size:512/prefixed-percent:99
11256 ns 11054 ns 64779 bytes_per_second=22.0744G/s
compression_ratio=1.49377 items_per_second=46.3189M/s
BM_DeltaDecodingByteArray/max-string-length:1024/batch-size:2048/prefixed-percent:10
48952 ns 48250 ns 15172 bytes_per_second=19.7334G/s
compression_ratio=1.02442 items_per_second=42.4457M/s
BM_DeltaDecodingByteArray/max-string-length:1024/batch-size:2048/prefixed-percent:90
55541 ns 55254 ns 13393 bytes_per_second=17.3787G/s
compression_ratio=1.39937 items_per_second=37.0654M/s
BM_DeltaDecodingByteArray/max-string-length:1024/batch-size:2048/prefixed-percent:99
56774 ns 55670 ns 12910 bytes_per_second=17.248G/s
compression_ratio=1.47214 items_per_second=36.7882M/s
```
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