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* Added ``bzrlib._simple_set_pyx``. This is a hybrid between a Set and a
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Dict (it only holds keys, but you can lookup the object located at a
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given key). It has significantly reduced memory consumption versus the
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builtin objects (1/2 the size of Set, 1/3rd the size of Dict). This will
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be used as the interning structure for StaticTuple objects, as part of
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an ongoing push to reduce peak memory consumption. (John Arbash Meinel)
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builtin objects (1/2 the size of Set, 1/3rd the size of Dict). This is
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used as the interning structure for StaticTuple objects.
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* ``BTreeLeafParser.extract_key`` has been tweaked slightly to reduce
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mallocs while parsing the index (approx 3=>1 mallocs per key read).
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This results in a 10% speedup while reading an index.
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(John Arbash Meinel)
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* ``bzrlib._static_tuple_pyx.StaticTuple`` is now available. This class
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functions similarly to ``tuple`` objects. However, it can only point at
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other ``StaticTuple`` instances or strings. This allows us to remove it
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from the garbage collector (it cannot be in a cycle), it also allows us
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to intern the objects. In testing, this can reduce peak memory by
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20-40%, and significantly improve performance by removing objects from
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being inspected by the garbage collector. (John Arbash Meinel)
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* The ``bzrlib.lsprof`` module has a new class ``BzrProfiler`` which makes
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profiling in some situations like callbacks and generators easier.
added
removed
NEWS
