{"type":"video","version":"1.0","html":"<iframe src=\"https://www.loom.com/embed/c01032e2e58b40a19394404b8f78d5a8\" frameborder=\"0\" width=\"1720\" height=\"1290\" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>","height":1290,"width":1720,"provider_name":"Loom","provider_url":"https://www.loom.com","thumbnail_height":1290,"thumbnail_width":1720,"thumbnail_url":"https://cdn.loom.com/sessions/thumbnails/c01032e2e58b40a19394404b8f78d5a8-fbb88442e6037d41.gif","duration":166.272,"title":"ClickHouse tuning, live — same query, 1.8 GB → 6 MB scanned (runnable + CI-verified)","description":"A 3-minute runnable proof of database tuning and CI regression prevention. Same 50M-row events table in two schemas — naïve vs tuned. Scanned data drops from 1.8 GB to 6 MB, and a GitHub Actions job fails the build if the tuning regresses."}