Lunderberg commented on code in PR #16183:
URL: https://github.com/apache/tvm/pull/16183#discussion_r1409864198


##########
include/tvm/runtime/packed_func.h:
##########
@@ -2129,6 +2315,42 @@ struct PackedFuncValueConverter<::tvm::runtime::String> {
   }
 };
 
+template <typename T>
+struct PackedFuncValueConverter<Array<T>> {

Review Comment:
   Regarding performance, I think we should be good there as well.  The 
conversion is applied instead of the existing recursive check in 
`ObjectTypeChecker<Array<T>>`, so no additional recursive walks.  The mutation 
is implemented in terms of `Array::Map`, which is copy-on-write, so no 
allocations occur if the user has provided the expected types (the common case).



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