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Reduce memory overhead for TransportableObject #1883

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Reduce memory overhead for TransportableObject #1883

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Commits on Jun 12, 2024

  1. Reduce memory overhead for TransportableObject 

    * Always represent TransportableObject internally as a single array of
bytes. Various properties, such as `header`, or `object_string`, decode
various segments of the byte array.

* Store the serialized object as raw picklebytes without
base64-encoding. As a result, `get_deserialized()` no longer needs to
create a temporary copy of the raw picklebytes. The data segment is
directly unpickled. Base64-encoding is applied to the data segment or
the entire internal buffer whenever a print friendly representation of
the `TransportableObject` is desired.

* Since the properties of `TransportableObject` are simply views into
the underlying buffer, `TransportableObject` may itself be serialized
efficiently by simply writing out the byte array.
`

Add backward compatibility layer for deserialization
    @cjao
    cjao committed Jun 12, 2024
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