Re: [Sbcl-help] Garbage collection for server with user sessions

[Brett v. de S. <bv...@as...>]

>
>If you can't or won't split into instances, I still believe hacking
>the data representation is the way to go. Complex data structures can
>be externalized just as well as simple ones -- or at least represented
>in a less pointer-intensive manner.

I came up with a rather interesting solution to this one (giving about
a 50% reduction in the size of my data structures).  I go through my 
data structures, which are basically large lisp expressions, and create 
a list of all distinct subexpressions.
Then I go through the data structures and remove any duplicate subexpression,
making all pointers to a given subexpression point to the same object
in memory.

Since the server never modifies these expressions, there is no
problem with several things pointing to the same subexpression.

Brett