The sidebar stays mounted beneath every overlay/page, and it subscribes to
$sessions + $workingSessionIds — both tick on every streaming token. An
unmemoized SidebarSessionRow re-rendered the whole list (Codicon, labels,
status dots) on each delta, and that churn bled into every overlay opened on
top: Cron, Profiles, Agents, Starmap, Webhooks, Command Center, Settings.
- SidebarSessionRow: memo() with a custom comparator that ignores the pure
id-forwarding callbacks (fresh closures by design) and compares only the
data that changes what the row paints. Rows bail out while siblings stream.
- SessionStatusDot: the 5 $...SessionIds arrays now read via useStoreSelector
returning this session's boolean, so a dot repaints only when ITS OWN
membership flips, not on every array tick.
- Artifacts: stable cellCtx (useMemo) + memoized Primary/Location/Session
cells so a link-title fetch on one row stops re-rendering the whole table.
Measured before/after (2s idle, sessions streaming), sidebar-fed overlays:
Cron 407->~30 wasted, Profiles 732->~80, Agents 132->9, Starmap 188->56,
Webhooks 154->22.
Brooklyn Nicholson