pitrou commented on PR #37874:
URL: https://github.com/apache/arrow/pull/37874#issuecomment-1744935098
Updated benchmarks here (AMD Zen 2, Ubuntu 22.04):
* before:
```
-----------------------------------------------------------------------------------------------------------------------------------------------
Benchmark
Time CPU Iterations UserCounters...
-----------------------------------------------------------------------------------------------------------------------------------------------
BM_DeltaDecodingByteArray/max-string-length:8/batch-size:512/prefixed-percent:10
5018 ns 5017 ns 100000 bytes_per_second=389.09M/s
compression_ratio=0.700959 items_per_second=102.047M/s
BM_DeltaDecodingByteArray/max-string-length:8/batch-size:512/prefixed-percent:90
4808 ns 4808 ns 134657 bytes_per_second=427.868M/s
compression_ratio=0.765799 items_per_second=106.495M/s
BM_DeltaDecodingByteArray/max-string-length:8/batch-size:512/prefixed-percent:99
4756 ns 4755 ns 135610 bytes_per_second=420.982M/s
compression_ratio=0.759524 items_per_second=107.676M/s
BM_DeltaDecodingByteArray/max-string-length:8/batch-size:2048/prefixed-percent:10
21241 ns 21238 ns 33959 bytes_per_second=359.857M/s
compression_ratio=0.695357 items_per_second=96.4296M/s
BM_DeltaDecodingByteArray/max-string-length:8/batch-size:2048/prefixed-percent:90
21215 ns 21211 ns 33216 bytes_per_second=368.188M/s
compression_ratio=0.753808 items_per_second=96.5536M/s
BM_DeltaDecodingByteArray/max-string-length:8/batch-size:2048/prefixed-percent:99
20278 ns 20274 ns 33480 bytes_per_second=386.568M/s
compression_ratio=0.762051 items_per_second=101.016M/s
BM_DeltaDecodingByteArray/max-string-length:64/batch-size:512/prefixed-percent:10
4737 ns 4736 ns 148976 bytes_per_second=3.20831G/s
compression_ratio=0.933408 items_per_second=108.115M/s
BM_DeltaDecodingByteArray/max-string-length:64/batch-size:512/prefixed-percent:90
5002 ns 5001 ns 136927 bytes_per_second=3.08213G/s
compression_ratio=1.19315 items_per_second=102.369M/s
BM_DeltaDecodingByteArray/max-string-length:64/batch-size:512/prefixed-percent:99
4987 ns 4986 ns 139231 bytes_per_second=3.01671G/s
compression_ratio=1.21214 items_per_second=102.684M/s
BM_DeltaDecodingByteArray/max-string-length:64/batch-size:2048/prefixed-percent:10
19989 ns 19986 ns 35066 bytes_per_second=3.02942G/s
compression_ratio=0.930448 items_per_second=102.472M/s
BM_DeltaDecodingByteArray/max-string-length:64/batch-size:2048/prefixed-percent:90
21737 ns 21732 ns 31170 bytes_per_second=2.81764G/s
compression_ratio=1.18361 items_per_second=94.2395M/s
BM_DeltaDecodingByteArray/max-string-length:64/batch-size:2048/prefixed-percent:99
22059 ns 22054 ns 30975 bytes_per_second=2.77557G/s
compression_ratio=1.22369 items_per_second=92.8648M/s
BM_DeltaDecodingByteArray/max-string-length:1024/batch-size:512/prefixed-percent:10
8545 ns 8543 ns 79054 bytes_per_second=27.8606G/s
compression_ratio=1.0309 items_per_second=59.9351M/s
BM_DeltaDecodingByteArray/max-string-length:1024/batch-size:512/prefixed-percent:90
9102 ns 9100 ns 77461 bytes_per_second=25.8281G/s
compression_ratio=1.43071 items_per_second=56.2662M/s
BM_DeltaDecodingByteArray/max-string-length:1024/batch-size:512/prefixed-percent:99
9429 ns 9426 ns 73866 bytes_per_second=26.8462G/s
compression_ratio=1.54352 items_per_second=54.3178M/s
BM_DeltaDecodingByteArray/max-string-length:1024/batch-size:2048/prefixed-percent:10
34260 ns 34255 ns 20326 bytes_per_second=28.1638G/s
compression_ratio=1.02877 items_per_second=59.7862M/s
BM_DeltaDecodingByteArray/max-string-length:1024/batch-size:2048/prefixed-percent:90
38045 ns 38038 ns 18457 bytes_per_second=25.7488G/s
compression_ratio=1.41325 items_per_second=53.8402M/s
BM_DeltaDecodingByteArray/max-string-length:1024/batch-size:2048/prefixed-percent:99
38601 ns 38594 ns 18100 bytes_per_second=26.0021G/s
compression_ratio=1.50832 items_per_second=53.0648M/s
```
* after:
```
-----------------------------------------------------------------------------------------------------------------------------------------------
Benchmark
Time CPU Iterations UserCounters...
-----------------------------------------------------------------------------------------------------------------------------------------------
BM_DeltaDecodingByteArray/max-string-length:8/batch-size:512/prefixed-percent:10
2701 ns 2701 ns 245508 bytes_per_second=722.842M/s
compression_ratio=0.700959 items_per_second=189.581M/s
BM_DeltaDecodingByteArray/max-string-length:8/batch-size:512/prefixed-percent:90
4227 ns 4226 ns 153065 bytes_per_second=486.726M/s
compression_ratio=0.765799 items_per_second=121.145M/s
BM_DeltaDecodingByteArray/max-string-length:8/batch-size:512/prefixed-percent:99
4173 ns 4172 ns 152447 bytes_per_second=479.758M/s
compression_ratio=0.759524 items_per_second=122.71M/s
BM_DeltaDecodingByteArray/max-string-length:8/batch-size:2048/prefixed-percent:10
10383 ns 10381 ns 66118 bytes_per_second=736.207M/s
compression_ratio=0.695357 items_per_second=197.279M/s
BM_DeltaDecodingByteArray/max-string-length:8/batch-size:2048/prefixed-percent:90
17619 ns 17615 ns 37814 bytes_per_second=443.344M/s
compression_ratio=0.753808 items_per_second=116.262M/s
BM_DeltaDecodingByteArray/max-string-length:8/batch-size:2048/prefixed-percent:99
18600 ns 18597 ns 35834 bytes_per_second=421.419M/s
compression_ratio=0.762051 items_per_second=110.123M/s
BM_DeltaDecodingByteArray/max-string-length:64/batch-size:512/prefixed-percent:10
2626 ns 2625 ns 252886 bytes_per_second=5.78763G/s
compression_ratio=0.933408 items_per_second=195.034M/s
BM_DeltaDecodingByteArray/max-string-length:64/batch-size:512/prefixed-percent:90
5100 ns 5099 ns 139164 bytes_per_second=3.02322G/s
compression_ratio=1.19315 items_per_second=100.413M/s
BM_DeltaDecodingByteArray/max-string-length:64/batch-size:512/prefixed-percent:99
5138 ns 5137 ns 131273 bytes_per_second=2.92809G/s
compression_ratio=1.21214 items_per_second=99.6678M/s
BM_DeltaDecodingByteArray/max-string-length:64/batch-size:2048/prefixed-percent:10
10647 ns 10646 ns 65412 bytes_per_second=5.68743G/s
compression_ratio=0.930448 items_per_second=192.38M/s
BM_DeltaDecodingByteArray/max-string-length:64/batch-size:2048/prefixed-percent:90
20188 ns 20184 ns 32917 bytes_per_second=3.03371G/s
compression_ratio=1.18361 items_per_second=101.466M/s
BM_DeltaDecodingByteArray/max-string-length:64/batch-size:2048/prefixed-percent:99
21673 ns 21669 ns 29778 bytes_per_second=2.82478G/s
compression_ratio=1.22369 items_per_second=94.5112M/s
BM_DeltaDecodingByteArray/max-string-length:1024/batch-size:512/prefixed-percent:10
3004 ns 3004 ns 231770 bytes_per_second=79.2403G/s
compression_ratio=1.0309 items_per_second=170.465M/s
BM_DeltaDecodingByteArray/max-string-length:1024/batch-size:512/prefixed-percent:90
8603 ns 8602 ns 81008 bytes_per_second=27.3233G/s
compression_ratio=1.43071 items_per_second=59.5234M/s
BM_DeltaDecodingByteArray/max-string-length:1024/batch-size:512/prefixed-percent:99
9428 ns 9426 ns 73990 bytes_per_second=26.8451G/s
compression_ratio=1.54352 items_per_second=54.3156M/s
BM_DeltaDecodingByteArray/max-string-length:1024/batch-size:2048/prefixed-percent:10
12057 ns 12055 ns 58266 bytes_per_second=80.0331G/s
compression_ratio=1.02877 items_per_second=169.895M/s
BM_DeltaDecodingByteArray/max-string-length:1024/batch-size:2048/prefixed-percent:90
36052 ns 36046 ns 19424 bytes_per_second=27.1721G/s
compression_ratio=1.41325 items_per_second=56.8163M/s
BM_DeltaDecodingByteArray/max-string-length:1024/batch-size:2048/prefixed-percent:99
39117 ns 39111 ns 17756 bytes_per_second=25.6587G/s
compression_ratio=1.50832 items_per_second=52.364M/s
```
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