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perf(dashboard): speed up startup and eliminate API request storms

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Multiple coordinated fixes for the perceived "dashboard takes forever to
load" complaint. Per-page-load HTTP requests drop from ~177 to ~101 and
duplicate per-project InProcessRuntime creation is eliminated.

- engine: shouldUseHybridExecutor no longer auto-enables for local-only
  multi-project setups (set FUSION_HYBRID_EXECUTOR=1 to force). The
  duplicate-runtime path was running self-healing twice per project and
  contending on the same SQLite file. ProjectEngineManager already
  handles N local projects with one InProcessRuntime each.
- dashboard cli: parallelized independent store inits, started
  CentralCore.init early in background, ran plugin loading concurrently
  with extension resolution. Sequenced SQLite store inits to avoid a
  TOCTOU race in addColumnIfMissing migrations across TaskStore /
  AutomationStore / PluginStore / AgentStore (all open the same
  .fusion/fusion.db). Restored try/catch around HybridExecutor.initialize
  and engineManager.ensureEngine so a paused or broken cwd project no
  longer aborts dashboard startup.
- dashboard client: added in-flight request dedupe wrapped around the
  top API offenders. /api/plugins/ui-slots drops from 17x to 1x per load.
  dedupe.forceFresh redirects ALL in-flight waiters to receive the fresh
  post-mutation response, not just the forcing caller. Generation
  counters in useAgents and AgentListModal protect against slow polls
  overwriting fresh state.
- dashboard SSE: agent event handler now debounces 250ms with a
  trailing-edge guard so multi-agent activity bursts coalesce to at
  most 2 refetches per burst.
- dashboard route: PATCH /api/projects/:id with isolationMode change
  returns 503 with actionable guidance when HybridExecutor is
  unavailable, instead of silently persisting a config the live runtime
  won't honor.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
gsxdsm
2026-05-26 21:45:13 -07:00
parent 9bea9510c0
commit 6a6c6fdbfd
15 changed files with 515 additions and 164 deletions
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"@runfusion/fusion": patch
"@fusion/dashboard": patch
"@fusion/engine": patch
---
Dashboard startup and request-storm fixes:
- **Faster startup**: parallelized independent store inits, started CentralCore init early in background, and ran plugin loading concurrently with extension resolution. The duplicate-runtime root cause is also fixed — `shouldUseHybridExecutor` no longer auto-enables for local-only multi-project setups, where `ProjectEngineManager` already handles project lifecycle (set `FUSION_HYBRID_EXECUTOR=1` to force-enable). Eliminates ~7s of redundant self-healing pipeline work per cold start.
- **Per-page request reduction**: added in-flight request dedupe (`packages/dashboard/app/api/dedupe.ts`) wrapped around the top API offenders. A single page load went from ~177 requests to ~101, with `/api/plugins/ui-slots` dropping from 17× to 1×.
- **Stale-data-after-mutation hazard**: `forceFresh` option on the deduped fetchers now redirects ALL in-flight waiters to receive the fresh post-mutation response, not just the forcing caller. Generation counters in `useAgents` and `AgentListModal` provide a second layer of protection against slow polls overwriting fresh state.
- **SSE refresh storm**: agent SSE event handler now debounces (250ms) with a trailing-edge guard, so multi-agent activity bursts coalesce to at most 2 refetches per burst instead of one per event.
- **Live isolation-mode transition**: PATCH `/api/projects/:id` with an `isolationMode` change now returns a 503 with actionable guidance when HybridExecutor is unavailable (local-only single-node), instead of silently persisting a config that the live runtime won't honor.
- **Error handling regression**: restored try/catch around `HybridExecutor.initialize` and `engineManager.ensureEngine` in the parallel engine setup so a paused or broken cwd project no longer aborts dashboard startup.
- **TaskStore migration race**: sequenced the SQLite store inits (TaskStore → AutomationStore → PluginStore → AgentStore) since they all open the same `.fusion/fusion.db` and run `addColumnIfMissing` migrations with a TOCTOU `hasColumn` → `ALTER` pattern.