guberti commented on PR #12521:
URL: https://github.com/apache/tvm/pull/12521#issuecomment-1223847059

   @areusch I addressed your minor comments, but I think there is a broader 
discussion to be had about what types of arguments `ApplyHistoryBest` should 
take. Taking `Union[Records, Iterable[Records]]` is the "least bad" solution 
IMO that preserves all existing functionality, such as the ability to pass 
`Iterable[str]` (e.g. a list of filepaths) and `Iterable[Tuple[MeasureInput, 
MeasureResult]]`.
   
   If we're OK with breaking some rarely used functionality, though, this could 
be simplified a lot. `autotvm.callback.log_to_file` supports writing to and 
only to file-like and path-like objects, so if we wanted `ApplyHistoryBest` and 
`ApplyGraphBest` to match, I would change the function signature to:
   
   ```python
   class ApplyHistoryBest(DispatchContext):
       ...
       def load(self, records: Union[str, bytes, PathLike, TextIOBase]):
   ```
   
   What's your opinion here?


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