Learning Tableau 2019 - Third Edition

Performance considerations

When working with a small dataset and an efficient database, you often won't notice inefficient calculations. With larger datasets, the efficiency of your calculations can start to make a fairly dramatic difference to the speed at which a view is rendered.

Here are some tips for making your calculations as efficient as possible:

• Boolean and numeric calculations are faster than string calculations. If possible, avoid string manipulation and use aliasing or formatting to provide user friendly labels. For example, don't write the following code: IF [value] == 1 THEN "Yes" ELSE "No" END. Instead, simply write [value] == 1, and then edit the aliases of the field and set True to Yes and False to No.
• Always look for ...