We have successfully optimised a key area for performance within the On Save workflow.  Typically, this is when most customer choose to run Workflow, on Save of a record.

The re-engineered logic now performs conditional checks more efficiently, consolidating what were previously separate database queries. This enhancement has resulted in a significant reduction in the overall save time for records, thereby improving system responsiveness and the user experience.

Take a look here for an overview on what you can do with Workflow.