When you indicate you are looking up customers, what do you mean? Using the SmartFinder to search for a customer? Editing or viewing a customer from the grid? Knowing the process you using will help us give a better answer.

Running anti-virus software in auto-protect mode will slow down data access. Perhaps you can exclude Adagio data directories from this mode.

Using the SmartFinder has had significant speed increases in the 90A upgrade.

When records are deleted in Adagio, the file size is not immediately decremented. Rather, records are marked to be overwritten when new transactions are created. If you want a file size decrease, then Adagio DataCare could be used to compact the deleted records.