SDN (Software Defined Networking) provides a way to flexible networks and makes the management easy. This is achieved by the programmable controllers. OpenFlow is a popular SDN protocol. In an OpenFlow network, the controller is the only part implemented logically, all the switches can only execute the instructions from the controller. Therefore, it is important to understand how a controller impacts an OpenFlow network for researchers and network managers. In this paper, we present a user-friendly OpenFlow controller performance evaluation tool that aims to help network researchers building performance models of OpenFlow controllers and network manager to understand the behavior of OpenFlow controllers. The tool uses a virtual OpenFlow switch sending OpenFlow messages to a controller and measures the response time. It fits the response time to a hyper-Erlang distribution. Through the fitted distribution, The tool can offer more clearly performance characteristic than the existing tools. The tool can export its result into JMT, it helps users to build and evaluate their performance models.