Improve performance of R8Loader. #21357
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The repeated small stream reads of ReadUInt16 generate a lot of overhead. Instead, consume the data in a single ReadBytes call and then unpack within the same buffer.
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The repeated small stream reads of ReadUInt16 generate a lot of overhead. Instead, consume the data in a single ReadBytes call and then unpack within the same buffer.
Reduces the CPU used by the R8Loader.Frame constructor when opening the d2k mod from 7.1% to 1.5%.