Not a solution unfortunately. On my end, it doesn't really run out of memory even without increasing the runtime size. But it still takes a while to generate. But like I said, its bad design. On top of that, its highly cpu unfriendly. _Lots_ of cache misses, and those are expensive.
Good enough for a workaround I guess. But why such a large size though? The largest map size in AoE2 was apparently 256