hermes-agent/apps
ethernet f1af945f6c
fix(desktop): slow session switch (#65890)
react-router v7's HashRouter wraps every route state update in
React.startTransition() by default. In React 19's concurrent renderer,
transitions are non-urgent — React can yield mid-render and come back
later. When the app is under load (streaming token deltas, gateway
events, store updates from active sessions), those higher-priority
updates keep interrupting the transition, starving the route change commit.

This matches every symptom of the session-switch lag:
- Main thread is free (animations run, clicks work) — startTransition
  defers, it does not block
- navigate() does not take effect for seconds — the transition keeps
  getting interrupted by higher-priority updates
- Worse under load — more concurrent re-renders = more interruptions
- The whole UI (sidebar + main pane) does not update — the entire route
  change is one transition, so nothing commits until it finishes

Pass useTransitions={false} to HashRouter so route state updates are
synchronous at default React priority instead of deferred transition
priority. navigate() now commits and paints immediately.

See: react-router v7 chunk-BIP66BKV.js HashRouter implementation.
2026-07-16 15:34:53 -04:00
..
bootstrap-installer fmt(js): npm run fix on merge (#65229) 2026-07-15 21:40:56 +00:00
desktop fix(desktop): slow session switch (#65890) 2026-07-16 15:34:53 -04:00
shared fmt(js): npm run fix on merge (#65229) 2026-07-15 21:40:56 +00:00