Internet of Things (IoT) Cloud is emerging as an innovative distributed system consisting of a set of Single Board Computers (SBCs), smart phones and any other kind of smart devices interconnected to a Cloud system through the Internet. It offers IoT as a Service (IoTaaS) consisting of one or more micro-services deployed on smart devices. Typically, Cloud-of-Things (CoT) allows to move services from the Cloud to these IoT devices in real-time. In this context, the container virtualization is a lightweight solution that can be adopted in IoT devices, for enhancing service provisioning, setup, and management of micro-services in order to guarantee Quality of Service (QoS). In this paper, we analyse the overhead introduced by container virtualization when multiple concurrent containarized micro-services are executed in parallel within the same IoT device in order to optimize both virtual sensing and actuating resources …