mapleFU commented on PR #55248:
URL: https://github.com/apache/arrow/pull/55248#issuecomment-6397024016

   Benchmark result on my EPYC:
   
   ```
   benchmark | before | after | improvement
   -- | -- | -- | --
   BM_AlpDecodingFloat/1024 | 1015 ns | 354 ns | 2.9x
   BM_AlpDecodingFloat/4096 | 3390 ns | 786 ns | 4.3x
   BM_AlpDecodingFloat/32768 | 25.4 µs | 4.4–5.5 µs | 4.6–5.8x
   BM_AlpDecodingFloat/65536 | 50.0 µs | 8.6 µs | 5.8x
   BM_AlpDecodingDouble/65536 | 52.4 µs | 43.8 µs | 1.2x
   ```


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