Experimental cuckoo hash table of white segments#134

Draft

rptb1 wants to merge 20 commits intomasterfrom branch/2014-02-28/white-cuckoo

+42,752-18,348

Commits on Feb 28, 2014

Branching to experiment with a cuckoo hash table of white segments.
rptb1
committed

Commits on Feb 28, 2016

Eliminating segment pointer from tract, and loops over tracts when creating and destroying segments.
rptb1
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Replacing SegFirst/SegNext loops with tree traversals in condemn and reclaim.
rptb1
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Replacing SegFirst/SegNext with tree traversal in ArenaExposeRemember.
rptb1
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Catching infinite loop case in hacky cuckoo-hash insertion with an assertion.
rptb1
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Replacing SegFirst/SegNext with tree traversal in TraceStart.
rptb1
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Replacing SegFirst/SegNext with tree traversal in formatted objects walk.
rptb1
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Replacing SegFirst/SegNext with tree traversal in root walking. NOTE: No test.
rptb1
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Commits on Feb 29, 2016

Removing loop over tracts in condemn, and replacing with actual intention to loop over grains.
rptb1
committed

Commits on Mar 1, 2016