On a somewhat related note, I have a test drawing with roughly 3500 of these solids (as DBR objects owned by other custom objects) and something like another 5000 other objects. In the real world for our line of business customers could easily have drawings of this magnitude and worse.
The problem is that on loading the drawing, it takes about 9 seconds to reach 93% (perfectly acceptable), and then it sits there for 150 seconds(!) doing what appears to be memory management. This is not so acceptable for a customer.
If I try to create a representative equivalent drawing using plain solids directly inserted via AutoCAD (3500) and ~5000 lines representing our other custom objects, it takes 66 seconds to get to 93% but only another 12 to finish that last bit. Quite why our drawing takes so much longer at the end, or why the pure AutoCAd object one takes longer to reach 93% is a bit of a mystery since this timing is before the load has finished and to my knowledge no extra work of ours was being performed during that time (I would have to check more closely to be sure), but even for a pure AutoCAD object drawing (no custom objects), over a minute is still a little excessive.
Closing the drawings produces a comparable wait while (presumably) it manages the memory being cleaned up.
Any suggestions as to what might be causing so much memory management? From a layman's point of view I would have expected most of the memory allocation to be done while making room for filing in the objects.
If I load the pure AutoCAD object drawing first, then close it, and in the same AutoCAD session try and load our drawing... it takes upwards of 8 *minutes* after that 93% point, implying that it is struggling to allocate memory (possibly because it has become very fragmented from the previous load?). If there's anything we can do to help alleviate this problem I would be grateful to know.
