1e37a94bb5
Prior to this CL, creating an empty message object would create two empty string objects for every declared field. First we created a unique string object for the field's default. Then we created yet another string object when we assigned the default value into the message: we called #encode to ensure that the string would have the correct encoding and be frozen. I optimized these unnecessary objects away with two fixes: 1. Memoize the empty string so that we don't create a new empty string for every field's default. 2. If we are assigning a string to a message object, avoid creating a new string if the assigned string has the correct encoding and is already frozen. |
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