Jefffrey commented on PR #16483:
URL: https://github.com/apache/datafusion/pull/16483#issuecomment-3315506735

   > Hm, interestingly, the speedup is not higher than I expected... I assume 
there may be some inconsistencies in benchmark code, I have experience only 
with JMH, so, I may miss something here. /cc @Dandandan
   > 
   > Benchmark results:
   > 
   > ```
   > Benchmarking compute_hex_new: Warming up for 3.0000 s
   > Warning: Unable to complete 100 samples in 5.0s. You may wish to increase 
target time to 5.1s, or reduce sample count to 90.
   > compute_hex_new         time:   [49.225 ms 49.905 ms 50.779 ms]
   > Found 8 outliers among 100 measurements (8.00%)
   >   2 (2.00%) high mild
   >   6 (6.00%) high severe
   > 
   > Benchmarking compute_hex_old: Warming up for 3.0000 s
   > Warning: Unable to complete 100 samples in 5.0s. You may wish to increase 
target time to 5.0s, or reduce sample count to 90.
   > compute_hex_old         time:   [50.322 ms 50.565 ms 50.820 ms]
   > Found 3 outliers among 100 measurements (3.00%)
   >   3 (3.00%) high mild
   > ```
   > 
   > Hardware: MBP m3 pro
   > 
   > Benchmark code:
   
   @Fly-Style I think you should be benchmarking raw Int64Arrays instead of 
DictionaryArrays 🤔 


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