[phobos] Sealed Hash Tables

[David Simcha]

  I've come to the realization that one of the most annoying library 
level problems in D2 is lack of a good hash table implementation for 
large tables.  The builtin AAs aren't bad for small to medium sized 
tables, but are absolutely terrible for large tables due to the way they 
manage memory.  Is anyone already working on a sealed container 
implementation of hash tables?  If not, would others be interested in my 
RandAA (http://dsource.org/projects/aa) after some cleanup, etc.?  I 
believe that this design is extremely well suited to the sealed 
container paradigm, and it interacts much better with the GC than the 
builtin impl. when dealing with large arrays.