wangjialing218 commented on issue #12269:
URL: https://github.com/apache/pulsar/issues/12269#issuecomment-951783218


   > If I just need to filter based on the content of the message, and the 
developer can tolerate the CPU and memory usage, why not? It all depends on the 
developer's implementation
   
   The Entry data here is in direct memory, if user call `Entry.getData()` in 
there implmentation, the Entry data will transfer to heap. If message traffic 
is high, broker heap may be full soon and GC will repleated in seconds.
   We need to evaluate the impact carefully.


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