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 to get the most efficiency in your calculations:
IF [value] == 1 THEN "Yes" ELSE "No" END. Instead, simply write
[value] == 1, then edit the aliases of the field, and set