Search: the reactive cache-preview filter no longer runs on the main
thread on every keystroke. It walked the whole cached-results pool
(thousands of items on a heavy user) inline; now each keystroke
debounces ~150ms and the scan runs on Dispatchers.Default. A submit
cancels the pending preview so a late scan can't clobber live results.
Feed: mergeFromCache memoizes the relative-upload-date parse by string,
so the recency regex runs once per distinct "N days ago" value instead
of once per item (~3000 per merge on a 200-sub feed) — across
hydration, every refresh, and each background-enrichment emit.
No behavior change.
Cobb
1730ed3dc8