Subject: publishing
From: Craig Chambers (chambers@cs.washington.edu)
Date: Sun Feb 25 2001 - 17:30:44 PST
I'm publishing some small things.
*) I discovered a huge space cost in checkpoints (towers w/ 1.2.1 was
~275MB!). This was because the way the optimized dataflow graph was
built caused every file to depend on every global variable
declaration! I fixed this, and now the checkpoint plateaus at around
65MB. (Memory costs are similarly cut.)
*) While I was searching for the space leak, I changed some uses of
hash_sets with list_sets, when I thought that the number of elements
in the set was typically small (e.g. list of direct parents of a
class, and list of methods in a GF). Hash_sets and hash_tables have
fairly large space overheads, so they're best used for large sets,
often tested for membership, where linear search is too slow.
*) I also removed the unused immediate children set from the
class-hierarchy representation. Later, when we know what queries we
want to make of the class hierarchy, we can put back in what we need.
*) I removed some silly casts from some of the builder files that I
inserted just to get the typechecker to shut up. Vass's recent
publish made these casts unnecessary. (It produced some new spurious
type errors, however, which I assume Vass will fix soon.)
*) I did some miscellaneous reformattings in bc-compiler.cecil,
small-set.cecil, and name-resolve.cecil.
-- Craig
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