Performance evaluation of compact binary XML representation for constrained devices

Internet of Things (IoT) envisages an environment in which a huge number of heterogeneous devices will interact, collaborate and provide information to users or execute actuation commands based on the users´ instructions. Web services are seen as one of the most promising approaches for enabling such interactions. As most of the IoT devices are limited in terms of processing power, available memory and battery lifetime, one of the most important aspects is the efficient data transfer from the devices to the server side. This paper addresses the performance of embedded web services through evaluation of XML compact binary representation. Evaluation is based on comparative analysis of speed, memory and battery consumption for XML and Protobuf formats. Preliminary results show that the Protobuf significantly exceeds the XML in every aspect of conducted measures.