[DNMY] Streamline Dispatch Variable Reference Structure #247
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This seeks to address #159. It turns out that dispatching on the index types accounts for a fair portion of the performance limitations: https://discourse.julialang.org/t/unexpected-allocations-with-multiple-dispatch/76988. Hence we have a balance between performance of expression creation (aided by
GeneralVariableRef
s) and performance of querying values (aided by inhomogeneous datatypes). This PR seeks to find a good compromise.