[Vm-dev] Gemstone 64-bit object format and pointers

[btc at openinworld.com]

I just watched [1] on Gemstone's object format and was interested to see 
how it uses 000 in the low order bits for direct in-memory object 
pointers.  I presume Spur does something similar but was curious how it 
specifically compares. 

[1] http://www.youtube.com/watch?v=BAFUafgEwvw

Also, probably not a good idea but I wondered what pros/cons there might 
be to just adopting Gemstone's object format.

cheers -ben