I have a fairly simple early-schematic model. I started out by importing (linking) the autocad site plan and then working off of that. Then, it was decided that there would be two identical buildings on the site (at least for now), so I decided to link the building model into a site twice, to save on modeling time.
The problem is: after I imported the site plan, the file was loading really slowly, so I went back to the autocad drawing and discovered that it contained raster images that were turned off, making it a large file. I deleted and purged the images in the autocad file, then went back to Revit – no change, still slow loading. So I went into revit and purged decals and checked to see that there were no raster images attached. The file is still pretty large, like 27megs for a +/- 20,000sf building that has basically walls, floors and roofs, no groups, and one repeated truss family, and it is taking about 5 minutes to open.
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