Your Dashboard Is Slow — But You Don’t Know Why
The Slowness Spiral
“My dashboard takes 90 seconds to load. My stakeholders stopped using it. I don’t know where to start optimizing.”
“I tried switching to an extract but it’s still slow. Are my calculations the problem? My filters? The data source itself?”
“Performance Recorder gives me query times but I don’t know how to translate that into actionable changes.”
Why Tableau Performance Is Hard to Debug
Dashboard slowness is rarely caused by one thing. It’s usually a combination: too many marks on a single sheet, live connections where extracts would work, LOD expressions that force full-table scans, string calculations that can’t be pushed to the database, and filter actions that trigger cascading queries.
The performance recording tool tells you what is slow, but not why or how to fix it. And generic “Tableau performance tips” blog posts give you a checklist of 20 things without telling you which ones actually apply to your workbook.
How VizWhiz Pinpoints the Problem
Drop your workbook and VizWhiz maps out every data source, join, calculated field, and filter. Ask “Why is my dashboard slow?” and the AI analyzes your actual workbook structure — not a generic checklist.
- Identifies expensive calculations that prevent query push-down to the database
- Flags unnecessary complexity — blends that could be joins, live connections that should be extracts
- Spots filter configurations causing cascading query chains
- Recommends specific, actionable changes ranked by likely impact