Hi,
I am back on this thread I started 2 years ago. Luckily, some issues mentioned previously have been partly fixed, fixed and/or improve over time.
Recently I upgraded to ArcGIS 2.5. However, I can still notice and experience how slow ArcGIS Pro is for moving annotation or even slower when editing properties in the Annotation Pane. I do have some patience, but I fell it is just unacceptable!
If you edit the annotation text and/or change properties such as align or anything else, it just takes ages when you click Apply. The same delay occurs when clicking another annotation to edit in Annotation Pane.
To some extent, moving annotation with the Annotation tool is slow. Any time you move an annotation and click Finish (or press F2), it takes about 6-8 sec to process (probably updating spatial index or anything else).
As a result, it can easily take about 3 x 6-8 sec to perform some editing or adjustment to a single annotation.
For info, my annotation feature class contains 480 annotations in a single subtype (more subtypes mean even more time to edit, about 40-50 sec per edit)
Any performance improvement would be appreciated.