Slower after a UNDO

Hi

I have this:

- Large Drawing
- Undo Begin
- Set off all layer in a lisp program
- Draw with lisp a temporary diagram

then

- Undo Back to get to the original state

Everything work fine, but after this all the process got very slow.

Is UNDO keep some garbage in memory??

I have tried UNDO CONTROL NONE to erase all the changes
but all the process is still slow.

I close the drawing and open again and everything is normal again.

I'm using 2004 but i have check this in other computer and older version too.

Thank

 

Disregard Dean's comments about ISAVEPERCENT, that has
absolutely nothing to do with it.

The problem is most likely that when you undo the creation
of many objects, you are not removing all of the overhead of
them, because if that were the case, you could not redo the
operation to put them back intact.

Hence, there is still some overhead that results from a very
large, complex operation, even after you undo it.

For example, if you save the entity name of an entity whose
creation was undone, you can 'ressurect' it, with (entdel), and
of course, that means there must be something left behind to
identify the entity, even if its creation was undone.

The only real effective way to deal with this to save, shut down
and restart AutoCAD and reopen the drawing, but you can try
disabling and then re-enabling UNDO and see if that helps:

(command "._UNDO" "_Control" "_none" "._undo" "_all")



AcadX for AutoCAD 2004 Beta 1
http://mysite.verizon.net/~vze2vjds/acadx/AcadX16.zip

 

Thank Tony

But this doesn't work either.

As i post at first. I set UNDO BEGIN and turn off all layers, then i draw with lisp a small diagram then i undo back to
the previous state. So the big deal is almost thaw the layers back.

Thank