[GitHub] [doris] mrhhsg opened a new pull request, #11084: [improvement][agg]Process aggregated results in the vectorized way

[GitBox]

mrhhsg opened a new pull request, #11084:
URL: https://github.com/apache/doris/pull/11084

   # Proposed changes
   
   Issue Number: close #xxx
   
   ## Problem Summary:
   
   Aggregated results are currently processed row by row, this is an 
inefficient way of accessing memory and will call virtual functions too many 
times.
   
   Here test on clickbench(https://github.com/ClickHouse/ClickBench)  with SQL:
   ```sql
   SELECT UserID, COUNT(*) FROM hits GROUP BY UserID ORDER BY COUNT(*) DESC 
LIMIT 10;
   ```
   master:
   <img width="1301" alt="image" 
src="https://user-images.githubusercontent.com/1179834/180204059-997f16f1-9b51-4351-9b33-bbd8409b6b7a.png";>
   
   agg_result_vec:
   <img width="1387" alt="image" 
src="https://user-images.githubusercontent.com/1179834/180204114-70655f00-5b38-4d6d-9069-fefaac541026.png";>
   
   
   ## Checklist(Required)
   
   1. Does it affect the original behavior: (Yes/No/I Don't know)
   2. Has unit tests been added: (Yes/No/No Need)
   3. Has document been added or modified: (Yes/No/No Need)
   4. Does it need to update dependencies: (Yes/No)
   5. Are there any changes that cannot be rolled back: (Yes/No)
   
   ## Further comments
   
   If this is a relatively large or complex change, kick off the discussion at 
[d...@doris.apache.org](mailto:d...@doris.apache.org) by explaining why you 
chose the solution you did and what alternatives you considered, etc...
   


-- 
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.

To unsubscribe, e-mail: commits-unsubscr...@doris.apache.org

For queries about this service, please contact Infrastructure at:
us...@infra.apache.org


---------------------------------------------------------------------
To unsubscribe, e-mail: commits-unsubscr...@doris.apache.org
For additional commands, e-mail: commits-h...@doris.apache.org