kangkaisen created KYLIN-2349:
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             Summary: Serialize BitmapCounter with peekLength
                 Key: KYLIN-2349
                 URL: https://issues.apache.org/jira/browse/KYLIN-2349
             Project: Kylin
          Issue Type: Improvement
          Components: Metadata
    Affects Versions: v1.6.0
            Reporter: kangkaisen
            Assignee: kangkaisen


Currently, in {{BitmapCounter}} we deserialize the bitmap to get the 
peekLength, we know which is expensive in terms of CPU time from JMC hot code.

Actually, we could Serialize {{BitmapCounter}} with peekLength to avoid 
deserializing the bitmap when we get peekLength.

Of course, we need to keep forward compatibility.



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