Typical length of observation and template vectors is less than 60. Yet, the data structures must be designed so that there is no absolute limit for the lengths (apart from the physical memory available).
Typical number of templates in memory at a time is 12 and the maximum number is 40. Use of dynamic data structures is advisable here, too.
The maximum running time for one to one comparison (G-09) with vectors of length 60 is 10 seconds.