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cache generated classes, optimization and quick workaround to memory leak

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This commit is contained in:
Alex Ausch 2017-01-20 15:54:28 -05:00
parent 047575f20c
commit 2c36cc30dd
1 changed files with 8 additions and 1 deletions
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9
python/google/protobuf/reflection.py
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@ -61,6 +61,8 @@ else:
# Part of the public interface, but normally only used by message factories.
GeneratedProtocolMessageType = message_impl.GeneratedProtocolMessageType
MESSAGE_CLASS_CACHE = {}
def ParseMessage(descriptor, byte_str):
"""Generate a new Message instance from this Descriptor and a byte string.
@ -104,11 +106,16 @@ def MakeClass(descriptor):
Returns:
The Message class object described by the descriptor.
"""
if descriptor in MESSAGE_CLASS_CACHE:
return MESSAGE_CLASS_CACHE[descriptor]
attributes = {}
for name, nested_type in descriptor.nested_types_by_name.items():
attributes[name] = MakeClass(nested_type)
attributes[GeneratedProtocolMessageType._DESCRIPTOR_KEY] = descriptor
return GeneratedProtocolMessageType(str(descriptor.name), (message.Message,),
result = GeneratedProtocolMessageType(str(descriptor.name), (message.Message,),
attributes)
MESSAGE_CLASS_CACHE[descriptor] = result
return result