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Tarot is a web app that scans multi-gigabyte Minecraft world saves and maps every block of a chosen type, all inside the browser. The first version uploaded files to a Python backend. Profiling showed 84% of scan time went to Python interpreter overhead, so I moved the work into the browser and split it across all CPU cores. Scans now take about ten seconds, nothing gets uploaded, and the app needs no server. It's built with React, TypeScript and Tailwind, and has an interactive map that plots up to 100,000 results.
Live: sambrothers0.github.io/tarot
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