I use SQL compare periodically as I have many clients who have the same core DB and so during development I use SQL compare iteratively to update schema, table and stored procedure changes through the 30 instances of the databases. I noticed that it progressively gets slower and consumes more RAM. Obviously I can close and restart to get a new allocation and it speeds up again. But I noticed that when starting it was consuming about 180Meg, then after maybe 15 compares the memory allocation was close to 1Gig. So something is definitely being allocated and not freed up.