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[eric] views: boot an app runtime only after 800ms sustained focus, fixes sidebar-spam backend OOM

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ciregenz
2026-06-13 02:14:49 -07:00
parent 861f3520f9
commit 3978f9b03c
1 changed files with 10 additions and 10 deletions
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frontend/src/app/pages/Views/ViewEditor.tsx
+10 -10
View File
@@ -930,19 +930,19 @@ const ViewEditor: React.FC<Props> = ({ output }) => {
};
}, [workspaceId, runtimeShouldRun, appendTerminalLine]);
// One-shot trigger: first visit to Preview/Terminal flips runtimeShouldRun true; never flips back.
// Gated on previewSettled (same 250ms as the webview): each runtime/start boots a vite
// dev server serialized behind a global lock, so spam-clicking heavy apps used to queue a
// pile of vite boots that saturated the backend and stuck the app you landed on (preview
// frozen + "Initializing agent..."). Waiting out the debounce means only apps you actually
// stay on boot a runtime.
// One-shot trigger: flips runtimeShouldRun true only after you STAY on Preview/Terminal
// for 800ms, never flips back. Each runtime/start boots a vite dev server (a tree of node
// procs, serialized behind a global lock); the old 250ms preview gate was too short to stop
// spam-clicking from booting one per app, so frozen vite trees piled up (~2GB) and OOM-killed
// the backend. An 800ms sustained-focus timer, cleared on unmount, means an app you just
// click past never boots a runtime at all, only one you actually settle on does.
useEffect(() => {
if (!workspaceId || !previewSettled) return;
if (runtimeShouldRun) return;
if (!workspaceId || runtimeShouldRun) return;
const wantsRuntime = activeTab === TAB_PREVIEW || activeTab === TAB_TERMINAL;
if (!wantsRuntime) return;
setRuntimeShouldRun(true);
}, [workspaceId, activeTab, runtimeShouldRun, previewSettled, TAB_PREVIEW, TAB_TERMINAL]);
const t = setTimeout(() => setRuntimeShouldRun(true), 800);
return () => clearTimeout(t);
}, [workspaceId, activeTab, runtimeShouldRun, TAB_PREVIEW, TAB_TERMINAL]);
// Prefer the Vite dev server URL; fall back to legacy /serve/. New-mode pre-Vite renders the install placeholder (legacy URL 404s).
const showInstallPlaceholder = isNewModeRuntime && !frontendUrl;