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Do you have dashboards that take a painfully long time to load? Have you been told that Tableau can't handle large data sets or that you need to pre-aggregate your data in order for it to load quickly? At IBM Watson Health we deal with large data sets that can exceed 100 million rows and have learned some best practices and "tricks" to help dashboards load and perform without the need of pre-aggregating data (and losing key functionality). In this session we will share our real-world lessons learned in tuning Tableau workbook for optimal performance.