there are multiple attempts to vectorise pdata operations in fluxus, both of these types try to describe common (pdata-map!) like operations so they can be done in C++.

pdata-op is used for simple arithmetic operations with simple input values

pfunc is for much more complex things, skinning and animation type stuff - with arbitrary input values - this also indicates a way to parallelise expensive operations

need some time to think about unifying these things.