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Marc-André Bombeck
4916a29bbe
Entering the Insights overview fired every section's reads at once, about two dozen requests on a seeded account, and the server worked through them in a queue: the hero and the first sections waited behind trends, the period review, cycle, signals, rhythm events, health status, breathing, labs and ECG, all far below the fold. The first three sections in the account's own order still mount with the page. Every later one renders a 1 px sentinel until it comes within 400 px of the visible area of the shell's scroll container, then mounts and fetches; once mounted it stays. Measured on a seeded account under a 4x CPU slowdown: 24 -> 13 requests on entry, the entry network span 1.3-1.8 s -> 0.5-0.9 s, LCP about 1.35 s -> 0.9 s, blocking time about 550 ms -> 200 ms. Scrolling to the end still loads all 25 and renders all ten sections. Specs that assert on, measure or scan the lower sections scroll them in first through a shared helper, so their coverage is unchanged.