pitrou commented on PR #37641:
URL: https://github.com/apache/arrow/pull/37641#issuecomment-1717934936
Here are some results here.
Decoding doesn't look bad, it's on par with dict decoding (in items/s, I'm
not sure the bytes/s figure is consistently computed):
```
BM_DeltaDecodingByteArray/max-string-length:8/batch-size:512
3444 ns 3443 ns 201688 bytes_per_second=580.339M/s
items_per_second=148.719M/s
BM_DeltaDecodingByteArray/max-string-length:64/batch-size:512
3755 ns 3755 ns 183626 bytes_per_second=4.13331G/s
items_per_second=136.369M/s
BM_DeltaDecodingByteArray/max-string-length:1024/batch-size:512
5380 ns 5380 ns 129118 bytes_per_second=47.3178G/s
items_per_second=95.1757M/s
BM_DeltaDecodingByteArray/max-string-length:8/batch-size:2048
14293 ns 14291 ns 48895 bytes_per_second=550.606M/s
items_per_second=143.306M/s
BM_DeltaDecodingByteArray/max-string-length:64/batch-size:2048
15597 ns 15595 ns 44892 bytes_per_second=3.93516G/s
items_per_second=131.323M/s
BM_DeltaDecodingByteArray/max-string-length:1024/batch-size:2048
23939 ns 23934 ns 29173 bytes_per_second=41.7182G/s
items_per_second=85.5671M/s
BM_DictDecodingByteArray/max-string-length:8/batch-size:512
2953 ns 2952 ns 234887 bytes_per_second=1.29091G/s
items_per_second=173.433M/s
BM_DictDecodingByteArray/max-string-length:64/batch-size:512
4158 ns 4157 ns 169321 bytes_per_second=4.13726G/s
items_per_second=123.171M/s
BM_DictDecodingByteArray/max-string-length:1024/batch-size:512
10668 ns 10666 ns 65659 bytes_per_second=23.0956G/s
items_per_second=48.0035M/s
BM_DictDecodingByteArray/max-string-length:8/batch-size:2048
8789 ns 8788 ns 75111 bytes_per_second=1.7316G/s
items_per_second=233.051M/s
BM_DictDecodingByteArray/max-string-length:64/batch-size:2048
13147 ns 13144 ns 54072 bytes_per_second=5.20906G/s
items_per_second=155.814M/s
BM_DictDecodingByteArray/max-string-length:1024/batch-size:2048
46555 ns 46544 ns 15010 bytes_per_second=21.0795G/s
items_per_second=44.0014M/s
```
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