backuitist opened a new issue, #17597:
URL: https://github.com/apache/pinot/issues/17597

   > I've ran pyroscope over the minion, and found a hot spot. It's spending 
almost 40% of CPU building an ImmutableRoaringBitmap over and over again: 
`NullValueVectorReaderImpl.getNullBitmap`.
   > 
   > Used to be cached: 
https://github.com/apache/pinot/pull/7493/changes#diff-280f1cdcf9cc22203804c1a214f2b094d31fac0a7cf0fe03ac7421a24cef34ab
   > 
   > Note that while this is annoying, fixing it obviously won't solve the 
scalability problem. In fact I'll open up another ticket.
   > 
   > <img width="1782" height="676" alt="Image" 
src="https://github.com/user-attachments/assets/c04f604b-ad1d-48a7-95bf-6878f5f36595";
 /> 
   
    _Originally posted by @backuitist in 
[#17567](https://github.com/apache/pinot/issues/17567#issuecomment-3818469325)_


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