Slow loading DataGrid with Editable Fields

I'm using Datagrid with editable fields and in some cases a datagrid inside another, when I use this way my datagrid is getting very slow when I have several lines. Is there any way to improve performance or is this bad practice?

Start by reproducing a DataGrid with editable fields nested inside another DataGrid and several rows, then profile the loading path to identify the source of the slowdown. Done means establishing whether the nested editable configuration is supported and documenting or implementing a measurable performance improvement.

Written by the indexing model from the issue text.