perf(ops): early return if two nodes do not hash to the same value

ibis/common/grounds.py

@@ -217,7 +217,7 @@ def __hash__(self) -> int:
         return self.__precomputed_hash__
 
     def __equals__(self, other) -> bool:
-        return self.__args__ == other.__args__
+        return hash(self) == hash(other) and self.__args__ == other.__args__
 
     @property
     def args(self):