When you are creating a report the preview function in Smart Reporting will help you see what you are going to get, but can slow things down. Particularly if you are adding lots of columns and have not yet decided which filters you need to apply to your report.
You can take these two simple steps to temporarily turn-off the preview feature and speed up the refresh for column heavy reports.
Step 1. Go to your user profile, select Display Preferences and turn off Report Data Preview. That will stop the report refreshing whenever you add a field/column.
Step 2. When you want to refresh the report, you can make the refresh faster by setting the active row limit, this gives a preview of the report, but limits the records returned.
That's it! You should find your report creation super charged!