My code for formulating a specific JuMP optimisation model has started getting quite slow, and I would like to start optimising it by specifying types.
One of the main functions I call just searches through two dictionaries (which have either strings or symbols as keys) to return either 1) a Float64 2) an Int16 3) an array of either of those or 4) a string.
Is there a way of telling Julia that these are the only possible options, so that it can compile this function?