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pep-550: A couple of minor additions to the impl strategy section (#345)

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Yury Selivanov 2017-08-15 19:42:56 -04:00 committed by GitHub
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@ -911,6 +911,11 @@ complexity:
``N`` is the total number of items in the current **execution** ``N`` is the total number of items in the current **execution**
context. context.
Essentially, using HAMT for Local Contexts instead of Python dicts,
allows to bring down the complexity of ``sys.get_execution_context()``
from O(N) to O(log\ :sub:`32`\ N) because of the more efficient
merge algorithm.
Approach #3: Use HAMT and Immutable Linked List Approach #3: Use HAMT and Immutable Linked List
----------------------------------------------- -----------------------------------------------
@ -930,7 +935,7 @@ copied by reference in ``sys.get_execution_context()`` (eliminating
the expensive "merge" operation.) the expensive "merge" operation.)
With this approach, ``sys.get_execution_context()`` will be an With this approach, ``sys.get_execution_context()`` will be an
O(1) operation. **O(1) operation**.
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