Not sure of what your test set is like, but here are some things you might try. Pretty much all are conditional on your circumstance.
- Convert keyword tests to scripts.
- Manually code scripts instead of working from recordings.
- Use the Name Mapping to identify objects instead of Find().
- Use WaitAliasChild() instead of FindChild() when possible.
- Map objects with additional unique properties so that there are fewer ambiguous recognitions
- Reduce the Auto-Wait Timeout
- Remove superfluous visualizer screenshots