yjshen commented on issue #4973:
URL: 
https://github.com/apache/arrow-datafusion/issues/4973#issuecomment-1458236821

   Thank you @tustvold and @crepererum for your patient and detailed 
explanation.
   
   > aggregated values can be stored inline within the hash table
   
   I understand your main idea now and look forward to learning more about it.
   
   I agree that JIT is complex, and we should definitely try low-hanging fruits 
first.
   
   > we can support multiple approaches so long as they provide benefits to 
certain workloads.
   
   I agree to add this proposal as an alternative code path for aggregation. It 
would be great to have performance data in the future.


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