Keep in mind that your plug-in becomes a part of the DigiView application. Its performance and stability affects the entire application. At any given time, there can be dozens of plug-ins operating. Also, each plug-in is called to parse the raw data each time new data is captured. The plug-in's parse() routine is very performance sensitive. It can receive up to 100 million calls per data capture, per signal.
DigiView is fairly tolerant to plug-in lockups or crashes. The plug-in is loaded as a separate process. All communications with it use separate threads, timeouts (about 2 seconds) and large FIFOs. If the plug-in stops responding, DigiView will attempt to kill the process. However, killing a process is not always successful and certainly undesirable. If you are having problems with plug-in lock ups, it could affect the stability of the DigiView application or the system.