This class of functions forms only a small set. An important issue is the optimization of memory management. A large amount of data is used, but allocated as small chunks only. Without special memory management this may become a significant limitation for the program speed. The library helps the user to circumvent this problem, see memory allocation algorithms.
The evaluation of a single unit is a straight forward procedure. Most of the processing is done by the activation function and transfer function. Standard activation and transfer functions are available. A low level function for evaluating a unit is supported, eval_unit. The data structure of the network may be difficult for the novice programmer to find the parameters he or she wants. A list of functions to search the data structure for specific units, weights or links help the user around the data structure, see various routines.