The data for the SourceDebugExtension attribute is copied twice. It would be more efficient to only copy it once.
Currently, it is copied in both function ClassFileParser::parse_classfile_source_debug_extension_attribute() and in InstanceKlass::set_source_debug_extension().
Currently, it is copied in both function ClassFileParser::parse_classfile_source_debug_extension_attribute() and in InstanceKlass::set_source_debug_extension().