Append Features to an AGOL Hosted Feature Layer (HFL) from Geojson File with ArcGIS API for Python - Very Slow

[MikeVolz]

I am trying to append features to an AGOL HFL from a Geojson file with ArcGIS API for Python, but it is very slow.  I do not know if there is some sort of size limit for this procedure, as I am attempting to append 14K point features with about 20 columns to the AGOL HFL.

Has anyone attempted such an operation with success?

Any help or hints are greatly appreciated.  Thanks in advance.

[JakeSkinner]

@MichaelVolz yes, you can use the Delete Features tool, however you should note that the OBJECTIDs will not reset with this tool.  This tool is pretty fast, but not as fast as truncate.