perf: cut cold-start download 58% and startup heap 22% via measured chunk-graph fixes (#2742)
* fix(ui): update session-switch-resync test to current handleEvent/setSessionTodos signatures
Co-authored-by: Serhii Dziupin <makeittech@users.noreply.github.com>
* perf(build): split Shiki grammars/themes, CodeMirror legacy modes, and @pierre/diffs into on-demand chunks
Merging @shikijs/langs into one manual vendor chunk made the first language
request download every grammar (7.4 MB raw / 1 MB gzip). Letting Rollup split
these packages per dynamically imported module downloads only the languages,
themes, and modes actually used — matching how the worker build already
behaves. @pierre/diffs is split the same way so its pure patch parser (used by
the eager tool renderer) no longer drags the Shiki-importing render stack into
the startup graph.
Co-authored-by: Serhii Dziupin <makeittech@users.noreply.github.com>
* perf(ui): restore lazy heavy views and stop eager settings-graph loading
- MainLayout: DiffView/FilesView/GitView/PlanView return to lazyWithChunkRecovery
(they were silently made static in 2031e3b4 while their Suspense wrappers
remained), keeping the CodeMirror and @pierre/diffs stacks out of startup.
- ContextPanel: same lazy treatment for its Diff/Files/Git/Plan/Walkthrough
tabs, with null Suspense fallbacks.
- CommandPalette imported getSettingsNavIcon from SettingsView, statically
pulling the entire settings surface (SkillsPage -> CodeMirrorEditor -> vim
mode, theme registry -> @pierre/diffs) into the eager graph; the helper now
lives in lib/settings/metadata.
- The windowed SettingsWindow mounts only after its first open: rendering the
lazy component closed made React fetch the SettingsView chunk graph at
startup.
Co-authored-by: Serhii Dziupin <makeittech@users.noreply.github.com>
* perf(ui): keep @pierre/diffs + Shiki out of the eager chat graph and defer diff worker warmup
- DiffWorkerProvider no longer statically imports @pierre/diffs/worker or the
theme registry, and no longer spawns 3 workers plus a main-thread shared
highlighter during mount. Pools are created on demand through a dynamic
module load, warmed via requestIdleCallback after startup settles, and
useWorkerPool notifies consumers when a pool becomes available.
- ToolPart's rich diff preview moves to lazily loaded ToolPartDiffPreview;
the plain-text patch (PlainDiffFallback) renders while the chunk loads,
mirroring the existing error fallback. Theme registration happens during
render inside the lazy module so PatchDiff never renders unregistered ids.
- ChatInput mounts its lazy ToolOutputDialog only after the first attachment
preview opens instead of fetching the dialog chunk on the draft screen.
- getMarkdownSyntaxVars moves to a pierre-free markdownSyntaxVars module so
eager code-rendering consumers stop importing the registration module.
Co-authored-by: Serhii Dziupin <makeittech@users.noreply.github.com>
* perf(web): load ghostty-web and Nerd Fonts on first terminal use
- ghostty-web (638 KB raw JS + WASM VT) is dynamically imported when a
terminal actually mounts; TerminalView stays eagerly importable for the
bottom dock.
- The ~2 MB of CDN Nerd Fonts are no longer preloaded and force-loaded on
every cold start. index.html exposes an idempotent
__openchamberEnsureNerdFonts hook; TerminalViewport requests it on mount
and waits up to 2s so a cached font is in place before the glyph atlas is
built, while a cold CDN fetch never blocks the terminal. Runtimes without
the hook (VS Code, mobile) resolve immediately, matching their existing
fallback-font behavior.
Co-authored-by: Serhii Dziupin <makeittech@users.noreply.github.com>
---------
Co-authored-by: Serhii Dziupin <makeittech@users.noreply.github.com>
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@@ -29,14 +29,16 @@ import { cn } from '@/lib/utils';
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import { lazyWithChunkRecovery } from '@/lib/chunkLoadRecovery';
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import { ChatView } from '@/components/views/ChatView';
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import { DiffView } from '@/components/views/DiffView';
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import { FilesView } from '@/components/views/FilesView';
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import { GitView } from '@/components/views/GitView';
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import { PlanView } from '@/components/views/PlanView';
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// Keep TerminalView eager: the bottom dock reserves its height immediately, so
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// suspending here leaves a large blank panel on slower machines.
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// Other heavy views stay on-demand to reduce initial bundle parse time.
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// Other heavy views stay on-demand to reduce initial bundle parse time:
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// DiffView/FilesView pull the CodeMirror and @pierre/diffs stacks into the
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// startup graph when imported statically.
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const PlanView = lazyWithChunkRecovery(() => import('@/components/views/PlanView').then(m => ({ default: m.PlanView })));
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const GitView = lazyWithChunkRecovery(() => import('@/components/views/GitView').then(m => ({ default: m.GitView })));
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const DiffView = lazyWithChunkRecovery(() => import('@/components/views/DiffView').then(m => ({ default: m.DiffView })));
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const FilesView = lazyWithChunkRecovery(() => import('@/components/views/FilesView').then(m => ({ default: m.FilesView })));
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const DiagramView = lazyWithChunkRecovery(() => import('@/components/views/DiagramView').then(m => ({ default: m.DiagramView })));
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const SettingsView = lazyWithChunkRecovery(() => import('@/components/views/SettingsView').then(m => ({ default: m.SettingsView })));
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const SettingsWindow = lazyWithChunkRecovery(() => import('@/components/views/SettingsWindow').then(m => ({ default: m.SettingsWindow })));
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@@ -48,6 +50,17 @@ export const MainLayout: React.FC = () => {
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const isSessionSwitcherOpen = useUIStore((state) => state.isSessionSwitcherOpen);
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const isSettingsDialogOpen = useUIStore((state) => state.isSettingsDialogOpen);
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const setSettingsDialogOpen = useUIStore((state) => state.setSettingsDialogOpen);
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// Mount the windowed settings dialog only after its first open: rendering
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// the lazy component (even closed) makes React fetch the SettingsView
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// chunk graph (CodeMirror editor, vim mode, theme tooling) on startup.
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// Once opened it stays mounted so the close animation and state behave as
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// before.
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const [settingsWindowMounted, setSettingsWindowMounted] = React.useState(false);
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React.useEffect(() => {
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if (isSettingsDialogOpen) {
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setSettingsWindowMounted(true);
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}
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}, [isSettingsDialogOpen]);
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const isMultiRunLauncherOpen = useUIStore((state) => state.isMultiRunLauncherOpen);
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const setMultiRunLauncherOpen = useUIStore((state) => state.setMultiRunLauncherOpen);
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const multiRunLauncherPrefillPrompt = useUIStore((state) => state.multiRunLauncherPrefillPrompt);
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@@ -464,12 +477,14 @@ export const MainLayout: React.FC = () => {
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</div>
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{/* Desktop settings: windowed dialog with blur */}
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<React.Suspense fallback={null}>
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<SettingsWindow
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open={isSettingsDialogOpen}
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onOpenChange={setSettingsDialogOpen}
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/>
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</React.Suspense>
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{settingsWindowMounted ? (
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<React.Suspense fallback={null}>
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<SettingsWindow
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open={isSettingsDialogOpen}
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onOpenChange={setSettingsDialogOpen}
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/>
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</React.Suspense>
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) : null}
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</>
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)}
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