feat(#22): split heavy libs into separate build chunks - #30
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priscaenoch merged 1 commit intoJul 22, 2026
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Add build.rollupOptions.output.manualChunks to vite.config.ts so monaco-editor, 3d-force-graph, cytoscape, react-flow-renderer, jszip, and @webcontainer/api each emit as their own chunk instead of being inlined into whichever lazy route first imports them. All of these libraries were already only reachable through lazily-loaded route components (Sandbox, GraphPage, ContractPage, SubInvocationPage, BatchMultiCall), so no source changes were needed there - this was purely a bundler config change. Before -> after for the affected routes: - Sandbox route chunk: one monolithic 3.4MB (885KB gzip) chunk bundling monaco-editor + jszip + @webcontainer/api + app code -> split into monaco-editor (3.28MB), vendor-jszip (97KB), vendor-webcontainer (11KB), and a 16.6KB Sandbox app chunk that can now be fetched in parallel and cached independently of app code changes. - BatchMultiCall route chunk: 153KB (45KB gzip) bundling react-flow-renderer + app code -> split into a 14.8KB app chunk and a shared vendor-react-flow-renderer chunk. Pinned React/ReactDOM, Vite's dynamic-import preload helper, and a few small transitively-shared packages (@babel/runtime, tslib, d3-color/d3-interpolate/d3-timer) to their own always-loaded chunk; without this, Rollup's automatic chunking parked them inside one of the new vendor chunks, which would have forced unrelated routes to load that whole chunk (or, in React's case, duplicated the React runtime into a second chunk).
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Closes #22
Problem
monaco-editor, 3d-force-graph, cytoscape, react-flow-renderer, @webcontainer/api, and jszip had no chunking strategy, so each got inlined into
whichever lazy route imported it first — e.g. the Sandbox route shipped a single 3.4MB (885KB gzip) chunk bundling monaco-editor + jszip +
webcontainer + app code together.
Changes
vendor-3d-force-graph, vendor-cytoscape, vendor-react-flow-renderer, vendor-jszip, vendor-webcontainer.
d3-color/d3-interpolate/d3-timer) to an always-loaded framework chunk — without this, Rollup's automatic chunking either duplicated the React
runtime into a vendor chunk or trapped shared helpers inside Monaco, forcing unrelated routes to download it.
SubInvocationPage, BatchMultiCall).
Before → after
┌────────────────┬───────────────────────┬──────────────────────────────────────────────────────────────────────────────────────────────────┐
│ Route │ Before │ After │
├────────────────┼───────────────────────┼──────────────────────────────────────────────────────────────────────────────────────────────────┤
│ Sandbox │ 3.4MB / 885KB gzip │ 16.6KB app chunk + monaco-editor 3.28MB + vendor-jszip 97KB + vendor-webcontainer 11KB │
│ │ (one chunk) │ (parallel-fetchable, independently cacheable) │
├────────────────┼───────────────────────┼──────────────────────────────────────────────────────────────────────────────────────────────────┤
│ BatchMultiCall │ 153KB / 45KB gzip │ 14.8KB app chunk + shared vendor-react-flow-renderer chunk │
└────────────────┴───────────────────────┴──────────────────────────────────────────────────────────────────────────────────────────────────┘
Testing