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Saxon Fletcher
d0135231fb
## Problem Assistant conversations with multiple query and Edge Function blocks repeatedly render expensive content while streaming. Scrolling past the feed boundary can also move the surrounding layout. ## Solution Memoize unchanged messages, blocks, and code highlighting; batch streaming UI updates; and skip off-screen query layout while keeping block state mounted. Preserve streamed status updates and contain scrolling in the message viewport. The changes are shared by Next and TanStack. ## Review instructions 1. Compare the base branch and this branch using the same saved conversation containing 10–20 query, result/chart, and Edge Function blocks. Keep the browser, viewport, and conversation identical. 2. In Chrome DevTools, record Performance with 4× CPU throttling while streaming a follow-up, typing in the composer, and scrolling through the feed. Compare scripting/layout time and long tasks. React DevTools Profiler should show unchanged completed blocks avoiding renders during subsequent text updates. 3. Scroll away from query blocks and return. Confirm results, display settings, selections, and controls retain their state. Run a read-only query such as `select 1` and check its results still update. 4. Confirm “Thinking…” finishes, Stop retains the latest streamed text, and approval/skip, copy, edit, and branch actions still work. Repeated scrolling at the feed boundary must leave the outer layout/composer stationary; jump-to-latest and following new messages should still work. 5. Repeat in both runtimes: `STUDIO_FRAMEWORK=next pnpm dev:studio` and `STUDIO_FRAMEWORK=tanstack pnpm dev:studio`. Also check the assistant sidebar, which shares the feed. ## Validation - 170 assistant/Explorer tests and one shared CodeBlock test passed; formatting and Studio lint passed (two existing warnings). - Browser checks covered both route entry points, viewport state/geometry, and scroll behavior. - Review fixes: 23 focused tests, lint, formatting, and full Studio typechecking passed. Full production builds were not verified. ## Checklist - [x] I have read [CONTRIBUTING.md](https://github.com/supabase/supabase/blob/master/CONTRIBUTING.md) - [x] No docs content changed; docs authoring skills are not applicable. <!-- This is an auto-generated comment: release notes by coderabbit.ai --> ## Summary by CodeRabbit * **Performance** * Improved responsiveness in the AI assistant by reducing unnecessary updates while messages stream and conversation history is displayed. * Optimized query previews, message rendering, and code blocks to keep the interface smoother during use. * **Bug Fixes** * Improved handling of message edits and deletions during generation, and preserved the latest response when generation is stopped. * Improved conversation scrolling behavior while keeping conversation content and scroll areas working as expected. <!-- end of auto-generated comment: release notes by coderabbit.ai -->