Store current data in sparse matrix

[guimarqu]

Is it better to store current data in a sparse matrix instead of Dict to make loops over vars/constrs current data faster ?

What we currently do :

for (varid, var) in getvars(form)
    if getcurisactive(form, varid) && getcurisexplicit(form, varid)
        # do something
    end
end

What we could do :

for (varid, vardata) in getcurvarsdata(form)
   if getcurisactive(vardata) && getcurisexplicit(vardata)
      # do something
   end
end