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* Robert G. Jakabosky:

> Another quote from:
>> If someone, somehow eventually outgrows the 4G limit one could
>> switch to compressed pointers. Shifting the pointer by 3 or 4 bits
>> results in a 32 GB or 64 GB limit.
> It might be good to do this even if each instance of LJ2 isn't going to use 
> more then 4Gbytes of memory.

OpenJDK had some performance issues with this type of encoding: