mapleFU commented on PR #15140:
URL: https://github.com/apache/arrow/pull/15140#issuecomment-1369931093

   After enable `Release` on my PC, the benchmark runs faster, maybe benifits 
from SIMD unpack.
   
   ```
   BM_DeltaBitPackingDecode_Int64_Equal/1024                6339 ns         
6339 ns       109683 bytes_per_second=1.20349G/s items_per_second=161.53M/s
   BM_DeltaBitPackingDecode_Int64_Equal/4096               22626 ns        
22626 ns        31046 bytes_per_second=1.3488G/s items_per_second=181.033M/s
   BM_DeltaBitPackingDecode_Int64_Equal/32768             173717 ns       
173717 ns         4018 bytes_per_second=1.40539G/s items_per_second=188.628M/s
   BM_DeltaBitPackingDecode_Int64_Equal/65536             344667 ns       
344667 ns         2017 bytes_per_second=1.41667G/s items_per_second=190.143M/s
   BM_DeltaBitPackingDecode_Int64_Narrow/1024               5471 ns         
5471 ns       129494 bytes_per_second=1.39456G/s items_per_second=187.175M/s
   BM_DeltaBitPackingDecode_Int64_Narrow/4096              19144 ns        
19144 ns        36988 bytes_per_second=1.59413G/s items_per_second=213.961M/s
   BM_DeltaBitPackingDecode_Int64_Narrow/32768            147144 ns       
147142 ns         4809 bytes_per_second=1.65921G/s items_per_second=222.696M/s
   BM_DeltaBitPackingDecode_Int64_Narrow/65536            291892 ns       
291889 ns         2401 bytes_per_second=1.67283G/s items_per_second=224.524M/s
   BM_DeltaBitPackingDecode_Int64_Wide/1024                 6326 ns         
6326 ns       110957 bytes_per_second=1.2061G/s items_per_second=161.88M/s
   BM_DeltaBitPackingDecode_Int64_Wide/4096                22031 ns        
22031 ns        31938 bytes_per_second=1.38523G/s items_per_second=185.923M/s
   BM_DeltaBitPackingDecode_Int64_Wide/32768              170063 ns       
170062 ns         4107 bytes_per_second=1.43559G/s items_per_second=192.682M/s
   BM_DeltaBitPackingDecode_Int64_Wide/65536              391506 ns       
391508 ns         2045 bytes_per_second=1.24718G/s items_per_second=167.394M/s
   ```


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