Comment #12 on issue 3222 by [email protected]: Memory problems with
the cache
http://code.google.com/p/sympy/issues/detail?id=3222
Looks like it is a "shallow" sizeof. But even if it worked with objects,
this is not the right way to go IMO. How much would you expect the cache to
be allowed to use? 100 KB? 10 MB? 200 MB? It all depends on the system, and
how many sympy instances are running at the same time, etc. Unless you
*know* that cache does not help much when it grows bigger than X megabytes.
So the change in cache should be either conceptual (like the "make it
local" idea or "clear on every garbage collection" or "keep only 100 most
recently used items") or adaptive ("clear cache when 10% of available
memory is used" or "clear when there is no more than 100 MB left"), or a
hybrid of both.
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