Add a rebind step to alignWith
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`Rel8.Tabulate.alignWith` uses `theseTable` to recover the key, which translates to a mess of nested `CASE` expressions. This becomes exponential with repeated uses of `alignWith`. Adding a `rebind` step to `alignWith` to rewrite this `key` expression each time makes this linear.
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Rel8.Tabulate.alignWithusestheseTableto recover the key, which translates to a mess of nestedCASEexpressions. This becomes exponential with repeated uses ofalignWith. Adding arebindstep toalignWithto rewrite thiskeyexpression each time makes this linear.