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Commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
 bashrusakh
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59ecd86b4b |
perf: isolate chat streaming renders and reduce sidebar render cost (#1672)
Reworks the chat and session-sidebar render paths to cut render cascades, memory
churn, and UI jank on large sessions and big session trees. Behavior is preserved;
the changes are about *when* and *how much* the UI re-renders.
## Chat streaming
- Freeze the streaming message's parts in the bulk turn projection during streaming,
and re-inject live parts only in an isolated tail leaf, so a ~60/sec delta stream
no longer re-runs the whole-session projection or re-renders unrelated rows.
session with referential reuse of unchanged turns.
- Memoize message rows with field-aware comparators instead of reference equality.
- Replace the manual child-session polling in the task tool with the live SSE
stream + a one-shot load, removing a fetch/settle state machine.
## History loading & scroll
- Load an initial page fast, then prepend one older page in the background so the
scroll container has headroom and "load older on scroll-up" fires before the user
hits the absolute top.
- Compensate scroll synchronously (in a layout effect, before paint) for prepends —
including background prepends that don't originate from a user scroll — so the
viewport stays stable instead of judder-correcting on the next frame.
## Markdown rendering
- Render markdown synchronously *styled* on first paint (paragraphs, lists, code
cards, tables, inline code) instead of raw escaped text; the async pass then only
upgrades syntax-highlight colors. Eliminates the flash of full-width raw text.
- Load KaTeX CSS eagerly with the main bundle instead of inside the lazy markdown
chunk, avoiding a late stylesheet injection on first render.
## Sidebar
- Hoist per-row recursive tree walks out of row comparators into per-group
precomputed sets/keys; batch live-session lookups into a single map; add a
group-level memo boundary.
- Isolate rename drafts so per-keystroke typing doesn't repaint the row tree.
## Sync layer
- Add a staleness guard so a slow message fetch can't repopulate a session the user
navigated away from.
- Throw on fetch failure for authoritative loaders so a transient blip can't read as
an empty server response.
## Cleanup
- Remove dead code (unused hooks, params, duplicated inline types) surfaced while
reworking the above.
## Known issue
- A rare, purely cosmetic first-paint width flash can still appear on large sessions;
it has no behavioral or data impact and is tracked for a follow-up runtime trace.
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9199798a14 |
perf(right-sidebar): gate live effects, memoize lookups, always-mount tabs (#1674)
* perf(right-sidebar): gate live effects, memoize lookups, always-mount tabs
Performance fixes for the right sidebar (git/files/context tabs).
== Correctness / leak fixes (P0)
* RightSidebar: drop dead useEffect that re-nulled refs the resize
handler already nulled; collapse the redundant width/minWidth/maxWidth
triple into width + the existing --oc-right-sidebar-width variable.
* useUIStore: clamp setRightSidebarWidth to [MIN, MAX]; simplify
setRightSidebarOpen (22 lines -> 12).
* RightSidebarTabs: useRightSidebarGitSync now takes the right tab and
main tab and only polls when the right git tab is the visible consumer
and the browser is online + visible. Replaces a global poll that
fired for the lifetime of the open sidebar.
* GitView: commit-files fetch refactored to cancelled + Promise.all
(was a per-hash loop that could setState after unmount); getRemoteUrl
and refreshRemotes gated on cancelled/mountedRef; new module-scoped
mountedRef guards setIsSettingIdentity from firing after unmount.
* GitView + useGitmojiList: extract gitmoji fetch/cache into a hook
with module-level inflight promise + subscribers Set; stale-while-
revalidate from localStorage; ensureLoaded() for call-site-initiated
hydration; cancelled flag on setIsLoading to avoid the React
setState-after-unmount race.
* ProjectNotesTodoPanel: 400 ms notes debounce now cancels on blur
(was double-saving); persistProjectData chained per project through
a module-level Map<projectId, Promise> so a fast todo toggle racing
the debounced save no longer hits the server in parallel; resize
auto-adjust guards against same-value pings.
== Render fanout (P1)
* RightSidebarTabs: all three tab content components are now always
mounted with the hidden attribute. State and cache survive tab
switches. When activeMainTab === 'git' (or 'context') the matching
right tab is filtered out of the tab strip and a redirect effect
snaps any persisted-but-now-hidden right tab to 'files'. onSelect is
now a type-guarded handler instead of `as RightTab`.
* GitView: 13 separate useGitStore action selectors collapsed into one
useShallow block (one re-evaluation per store change instead of 13).
* GitView: new isGitViewActive flag (true when this instance is the
visible consumer) gates the 7 live effects — load identities, fetch
remote URL, refresh remotes, ensureAll, sessionEvents.onGitRefreshHint,
worktree bootstrap poll, default-identity auto-apply. Hidden
GitView instances no longer run these.
* GitView: gitViewSnapshots module-level Map is now backed by an
LRU wrapper (cap 20) so per-directory draft snapshots cannot leak
across hundreds of project switches. Removed the dead `unique.set`
dedup in changeEntries — GitStatus.files is already unique by path.
* SidebarFilesTree: statusByPath Map<path, FileStatus> and
badgeByDir Map<dirPath, { modified, added }> are precomputed once
per gitStatus change. Tree render is O(1) per node instead of O(N)
per node via the previous per-row find/scan. badgeByDir walks each
file's path segments and increments counters for every ancestor
dir, so total cost is O(N + total_dirs_in_files) per gitStatus
change.
* SidebarFilesTree: FileRow wrapped in React.memo with a custom
comparator. Context-menu open state moved INTO FileRow as local
state — opening a menu in one row no longer re-renders siblings.
* SidebarFilesTree: loadDirectory accepts an isCancelled predicate;
the batch-load effect for expandedPaths passes a stable predicate
so per-dir fetches stop touching state once the effect tears down.
* SidebarFilesTree: module-level fileTreeCacheByRoot Map (LRU,
cap 8 roots) hydrates childrenByDir / loadErrorsByDir /
loadedDirsRef on mount or root change. Mirror effects write state
back to the cache. Survives close-and-reopen of the right sidebar;
populated entries are dropped on unmount only when they had no
data.
== Result
Net diff: 6 files modified, 1 new (useGitmojiList.ts), 682 insertions,
283 deletions. Existing test suite baseline preserved (537 pass / 58
fail / 1 error) — no new regressions. The 58 pre-existing failures are
in unrelated chat/streaming tests and were verified via git stash on
the same branch.
Architecture assumptions, verified by manual review:
- P1.1's redirect effect snaps rightSidebarTab to 'files' whenever
activeMainTab === 'git', so the right and main GitView instances
are mutually exclusive — isGitViewActive cannot be true for both.
- The 7 gated effects plus the useRightSidebar GitSync poll cover all
cases where git state should advance: visible consumer fetches; the
poll keeps the store warm when only the right git tab is visible.
- The aborted loadDirectory predicate is sufficient because
inFlightDirsRef and loadedDirsRef dedup at the call site before
any network IO is initiated.
* fix(sidebar): always clean up inFlightDirsRef regardless of cancellation
* refactor(sidebar): deduplicate RIGHT_SIDEBAR_MIN/MAX_WIDTH constants, export from useUIStore
* docs: split right sidebar perf plan into standalone file, clean up merged master status from chat plan
* fix(git): gate GitView effects by instance visibility
---------
Co-authored-by: Leonid Skorobogatyy <bash@opencode.itc.local>
Co-authored-by: Bohdan Triapitsyn <artmore@protonmail.com>
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bashrusakhandLeonid Skorobogatyy
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d909c43979 |
refactor(sidebar): remove dead directoryStatus probe artifact (#1660)
Commit
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