xinyiZzz commented on issue #6075:
URL: 
https://github.com/apache/incubator-doris/issues/6075#issuecomment-870377767


   @xinghuayu007 If the left table has only 1000 rows of data, the use of 
runtime filter may result in performance degradation, even if only the smallest 
overhead `IN` filter is used and the actual filtering rate is very high, but 
this is negligible in most cases
   
   Detailed introduction, usage, and test results of Runtime Filtering for 
Doris will be gradually added on 
https://github.com/apache/incubator-doris/issues/6116


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