Matthias Koeppe mkoeppe+slime@mail.math.uni-magdeburg.de writes:
Marco Baringer mb@bese.it writes:
"Hoehle, Joerg-Cyril" Joerg-Cyril.Hoehle@t-systems.com writes:
In my particular case, huge data structures would have been ready to free if SLIME had not kept that link. How can I clear this value cache, or control the cache policy?
you can disable it completly by setting swank::*record-repl-results* to nil. you can clear the current set of values by clearing the repl buffer (M-x slime-repl-clear-buffer or C-c C-t).
I would like to add that the history is meant to be implemented by a _weak_ hash table, using the SLIME backend functions MAKE-WEAK-KEY-HASH-TABLE and MAKE-WEAK-VALUE-HASH-TABLE. If those are implemented properly for a CL implementation that supports weak hashtables, the REPL history items (and other presentations) do not cause any memory leak.
The functions are implemented both for Allegro CL and SBCL, but not for CLISP (which Jörg might be using), which I think has excellent support for weak hash tables.
An update: I have now provided these functions for CLISP.