orpiske commented on PR #9266:
URL: https://github.com/apache/camel/pull/9266#issuecomment-1409929106

   > Some remarks. Could you explain what is the benefit of converting the 
classes into static inner classes?
   
   It avoids having a reference to the enclosing class, thus saving a (small) 
amount of memory and making things easier for the garbage collector. 
   
   From the Java effective: 
   
   _"... If you declare a member class that does not require access to an 
enclosing instance, always put the static modifier in its declaration, making 
it a static rather than a nonstatic member class. If you omit this modifier, 
each instance will have a hidden extraneous reference to its enclosing instance 
...  "_
   
   _"... As previously mentioned, storing this reference takes time and space. 
More seriously, it can result in the enclosing instance being retained when it 
would otherwise be eligible for garbage collection (Item 7). The resulting 
memory leak can be catastrophic ..."_
   
   Given that our core tests are failing due to OOM, it's a small thing that 
helps. 


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