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perf: cut cold-start download 58% and startup heap 22% via measured chunk-graph fixes (#2742)

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* 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>
This commit is contained in:
Serhii Dziupin
2026-08-07 09:01:31 +03:00
committed by GitHub
co-authored by Serhii Dziupin
parent da3d467f82
commit bc380e6e1b
21 changed files with 585 additions and 380 deletions
Download Patch File Download Diff File Expand all files Collapse all files
packages/web/index.html
+29 -25
View File
@@ -15,12 +15,6 @@
<link rel="apple-touch-icon" sizes="167x167" href="/apple-touch-icon-167x167.png" />
<link rel="apple-touch-icon" sizes="152x152" href="/apple-touch-icon-152x152.png" />
<!-- Preload Nerd Fonts for terminal icon display -->
<link rel="preload" href="https://cdn.jsdelivr.net/gh/mshaugh/nerdfont-webfonts@v3.3.0/build/fonts/JetBrainsMonoNerdFont-Regular.woff2"
as="font" type="font/woff2" crossorigin="anonymous">
<link rel="preload" href="https://cdn.jsdelivr.net/gh/mshaugh/nerdfont-webfonts@v3.3.0/build/fonts/FiraCodeNerdFont-Regular.woff2"
as="font" type="font/woff2" crossorigin="anonymous">
<!-- Web app manifest (endpoint-first with data URL fallback) -->
<script>
const baseUrl = location.origin;
@@ -599,31 +593,41 @@
}, 10000);
</script>
<!-- CSS Font Loading API for reliable Nerd Font loading -->
<!-- CSS Font Loading API for reliable Nerd Font loading. The ~2 MB of
Nerd Fonts are only used by the terminal viewport, so they are no
longer downloaded on every cold start: the terminal requests them on
first mount through this idempotent hook. -->
<script>
(function() {
const fonts = [
{
name: 'JetBrainsMono Nerd Font',
url: 'https://cdn.jsdelivr.net/gh/mshaugh/nerdfont-webfonts@v3.3.0/build/fonts/JetBrainsMonoNerdFont-Regular.woff2'
},
{
name: 'FiraCode Nerd Font',
url: 'https://cdn.jsdelivr.net/gh/mshaugh/nerdfont-webfonts@v3.3.0/build/fonts/FiraCodeNerdFont-Regular.woff2'
let nerdFontsPromise = null;
window.__openchamberEnsureNerdFonts = function() {
if (nerdFontsPromise) {
return nerdFontsPromise;
}
];
const fonts = [
{
name: 'JetBrainsMono Nerd Font',
url: 'https://cdn.jsdelivr.net/gh/mshaugh/nerdfont-webfonts@v3.3.0/build/fonts/JetBrainsMonoNerdFont-Regular.woff2'
},
{
name: 'FiraCode Nerd Font',
url: 'https://cdn.jsdelivr.net/gh/mshaugh/nerdfont-webfonts@v3.3.0/build/fonts/FiraCodeNerdFont-Regular.woff2'
}
];
const fontPromises = fonts.map(font => {
const fontFace = new FontFace(font.name, `url(${font.url}) format('woff2')`);
document.fonts.add(fontFace);
return fontFace.load().catch(err => {
console.warn(`Failed to load font: ${font.name}`, err);
const fontPromises = fonts.map(font => {
const fontFace = new FontFace(font.name, `url(${font.url}) format('woff2')`);
document.fonts.add(fontFace);
return fontFace.load().catch(err => {
console.warn(`Failed to load font: ${font.name}`, err);
});
});
});
Promise.allSettled(fontPromises).then(() => {
document.documentElement.classList.add('fonts-loaded');
});
nerdFontsPromise = Promise.allSettled(fontPromises).then(() => {
document.documentElement.classList.add('fonts-loaded');
});
return nerdFontsPromise;
};
})();
</script>