Tableau Server is a solution for company intelligence providing browser-based visual analysis that can be used for only a fraction of the typical BI software costs. With a few clicks, you will be able to automatically post or embed interactive charts, dashboards, and reports with present information tailored for everybody's requirements. It deploys in MINUTES and customers can report thousands without IT facilities— all in their IT facilities. The data extracts, metadata fields and the calculations can be shared and uploaded, database connections can be preserved with the tableau data server and the tableau users can mediate it. Save and share with others any modifications to the parameters, data set, definitions, aliases and calculated fields to establish a safe, STANDARDIZED and centrally managed data set. The server funds can be leveraged and not first transmitted to the LOCAL machine and extract queries can be executed.

If you don't plan to use a set of rows, you should filter them out of the set data as quickly as necessary. When you have an all sales table and just want to check US sales, create a CUSTOM SQL application to filter out. When the filter depends on the worksheet, try using a context filter. We can always explore other filter types in Tableau to improve performance. It increases the efficiency but it should always improve the performance if you want to hide any field that you don't use in any of your worksheets, apart from "DIMENSIONS" then  "Hide all unused fields."