The emergence of cloud computing leads the variety of computer branches and technologies. As a branch of cloud computing, edge computing is a distributed computing diagram which allows edge devices as edge nodes to provide computation. To achieve this, the OpenStack++, as known as cloudlet, is introduced to represent a new architectural element in the 3-tier hierarchy: device - cloudlet - cloud. This empirical study will briefly introduce the OpenStack++, including the code structure, implementation, and features. Then, the thesis will examine the performance of OpenStack++ and compare it with Amazon EC2 instances and Microsoft Azure Virtual Machines.