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Add note about use_list.

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INADA Naoki 2012-12-06 22:26:39 +09:00
parent a1577a8838
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README.rst
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@ -42,6 +42,9 @@ To unpack it to list, Use ``use_list`` option.
>>> msgpack.unpackb(b'\x93\x01\x02\x03', use_list=True)
[1, 2, 3]
The default behavior will be changed in the future. (probably 0.4)
You should always pass the ``use_list`` keyword argument.
Read the docstring for other options.
@ -151,6 +154,27 @@ or Windows SDK on Windows. (NOTE: Visual C++ Express 2010 doesn't support
amd64. Windows SDK is recommanded way to build amd64 msgpack without any fee.)
PERFORMANCE NOTE
-----------------
GC
^^
CPython's GC starts when growing allocated object.
This means unpacking may cause useless GC.
You can use ``gc.disable()`` when unpacking large message.
use_list
^^^^^^^^^
List is the default sequence type of Python.
But tuple is lighter than list.
You can use ``use_list=False`` while unpacking when performance is important.
Python's dict can't use list as key and MessagePack allows array for key of mapping.
``use_list=False`` allows unpacking such message.
Another way to unpacking such object is using ``object_pairs_hook``.
TEST
----
MessagePack uses `nosetest` for testing.