[GitHub] [bookkeeper] lordcheng10 edited a comment on pull request #3061: Optimize memory：Support shrinking in ConcurrentLongLongPairHashMap

[GitBox]

lordcheng10 edited a comment on pull request #3061:
URL: https://github.com/apache/bookkeeper/pull/3061#issuecomment-1046045655


   The new changes are as follows:
   
   1.check if the parameter is legal;
   2.fix the shrinkage condition: 
     ①newCapacity > size: in order to prevent the infinite loop of rehash, 
newCapacity should be larger than the currently used size;
     ②newCapacity > resizeThresholdUp: in order to prevent continuous expansion 
and contraction, newCapacity should be greater than the expansion threshold；
     
     
   
![image](https://user-images.githubusercontent.com/19296967/154808631-86e232b8-107a-4927-9232-74c77d125fcc.png)
   


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