In production, the Message Sniffer plugin (CGPSNF - available for download on our Downloads page) is typically as fast as CommuniGate.

For one thing SNF doesn't make any off-server lookups in real-time so there are never any delays waiting for responses. The plugin is designed to handle as many concurrent message scans as CommuniGate needs and it has been carefully engineered to minimize and conserve resource allocations and contention so that every step of the scanning process can occur at full speed.