There are several explanations for the delay. Lumidigm Venus sensor is known to be slow. Template extraction takes approximately 200ms on standard PC. 1:N identification has a small constant overhead of 50ms. Initializing IDKit SDK and connecting to database is an expensive operation (over 1 second, and much more with big database, because all user records are loaded into memory during first database connection establishment) that should be performed only once upon application startup.