Atlas

Atlas is an internal analytics suite for teams that had outgrown spreadsheets but had no appetite for a full BI stack. The design constraint was unusual: most users open it once a week, so nothing could rely on remembered muscle memory or a learned mental model.

Performance turned out to be a design problem more than an engineering one. Streaming results and virtualised tables kept the interface honest about what it was still loading, and a saved-view model meant the expensive queries ran on a schedule instead of on every visit. Median time-to-first-chart went from eleven seconds to under one.