Annotation Scaling Performance Hit

[philA]

I am using AutoCAD 2009 (have used AutoCAD for many years) and just started working with Annotation Scaling today. So far I have just tried it with blocks and hatches. I like the way it works and the ability to set multiple scales for one object. Unfortunately, it seems to REALLY slow down any work in the drawing I am working in. The blocks are being set to annotative in a drawing that is being XREF'd into a sheet file. The biggest hit performance wise is in the sheet file that contains the XREF. Something as simple as changing the annotative scale of a viewport takes about 40 seconds. Thawing a layer inside one of the viewports now takes an extremely long time. Before I started using annotative scaling, those actions and others like them were nearly instantaneous. I do not have extra scales to clean up. I do have quite a few annotative objects - all my door numbers, room numbers, window numbers, hatching in the exterior walls, etc. All told, 197 objects, most have two scales 1/8" and 1/4". Any thoughts?

[RobertB]

If you do not need to save/export the drawings to older versions of AutoCAD, try setting SaveFidelity to 0.

[philA]

Thanks for the suggestions. I turned off savefidelity. The drawing still seems slow. For example, changing the annotation scale of a viewport takes from 45 seconds to a minute. Is that normal? (This is the sheet drawing which contains the XREF which has the annotation scaling.?

[RobertB]

That does seem too lengthy. How many scales are evident in the scale list of both drawings?