Why is it so slow for stan to compile model?

[mitzimorris]

currently, the generated c++ code for a Stan model requires too much compilation of code in the Stan services and math library. we’re working on it!

Is there a proper base class for stan_model?

Is there another thread or issue for the model class refactor that @mitzimorris is working on? Can’t find it… bumping this one. re: gains from pre-compiling parts of the model, I ran an experiment and compiled just the bernoulli.hpp as a shared object vs. bringing in the cmdstan main.cpp and thus the algorithms and services, and to summarize it seems like about half the time is being spent on math library stuff and half the time on services/algorithms. So @Bob_Carpenter the model class / algo /…