feat: cross module noop function optimization#6199
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crates/rolldown/src/stages/link_stage/cross_module_optimization.rs
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This pr only marks empty function calls as **side effects free** so that the minifier could eliminate them if possible, even when binding is imported from other chunks. Removing unused chunks will be done in the next pr. related to #3403
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## [1.0.0-beta.38] - 2025-09-15 📦 OXC Runtime Helpers Now Embedded - Instant loading: Memory access instead of file I/O - 91% smaller: From 229 KB external package to ~25 KB in binary - Universal support: Works seamlessly in all environments including browsers - Zero dependencies: Helpers embedded directly, no `@oxc-project/runtime` needed ⚡ Windows Performance Boost - ~10% faster bundling on Windows - Powered by `oxc-resolver` optimizations Both improvements require zero configuration - just update to the latest version and enjoy! 🎉 > [!warning] > ### 💥 BREAKING CHANGES > - rolldown_plugin_oxc_runtime: embed helpers to support browser environment (#6177) by @shulaoda ### 🚀 Features - rolldown: oxc v0.89.0 (#6220) by @Boshen - rolldown_plugin_esm_external_require: add duplicate external detection (#6202) by @shulaoda - cross module noop function optimization (#6199) by @IWANABETHATGUY - support to specify `scan_mode` in `bundler.scan` (#6204) by @IWANABETHATGUY - warn when transform options override tsconfig compiler options (#6197) by @shulaoda - support `false` in `resolve.alias` to ignore resolution (#6203) by @shulaoda - cli: remove `getJsonSchema` (#6186) by @shulaoda - cli: add Node.js version warning for unsupported versions (#6150) by @Copilot - rolldown_plugin_oxc_runtime: include version in virtual module paths (#6179) by @shulaoda - add native react-refresh-wrapper plugin (#6144) by @sapphi-red - rolldown_plugin_utils: add `to_string_literal` (#6178) by @sapphi-red - improve error messages for builtin plugins (#6175) by @shulaoda - indent module content in IIFE format (#6174) by @IWANABETHATGUY - rolldown_error: improve N-API error handling logic (#6171) by @shulaoda - rolldown_error: improve `ByteLocator#byte_offset` (#6169) by @shulaoda - dev: skip writing to file (#6148) by @sapphi-red - dev: add `skip_write` option (#6151) by @sapphi-red - dev: ignore file metadata changes (#6138) by @sapphi-red - dev: add PathsMut for debounced PollWatcher (#6139) by @sapphi-red - dev: use PathsMut for debounced RecommendedWatcher (#6137) by @sapphi-red - improve bundler initialization error handling (#6132) by @shulaoda ### 🐛 Bug Fixes - rolldown_plugin_vite_resolve: correctly handle Windows drive paths with leading slash (#6209) by @shulaoda - allow `jsx.pragmaFrag` instead of `jsx.pragmaFlag` (#6200) by @sapphi-red - improve import-glob plugin error handling without panic (#6106) by @hikomoon - Panic with "jsx": "preserve" when rewrite a `memberExpression` (#6192) by @IWANABETHATGUY - rolldown_error: use `byte_slice` instead of `slice` for correct span handling (#6185) by @shulaoda - generate valid identifier for export names with `minifyInternalExports` (#6166) by @sapphi-red - useless __export helper usage (#6160) by @IWANABETHATGUY - incremental watch modify entry module (#6156) by @IWANABETHATGUY - register trace subscriber (#6145) by @sapphi-red - json imports error with `eval` or `arguments` in *strict mode* (#6140) by @IWANABETHATGUY - `process` is not defined in repl (#6147) by @IWANABETHATGUY ### 💼 Other - rolldown: support to build `rolldown` with `.wasm` binding (#6153) by @hyf0 - rolldown: refactor `build.ts` to prepare to support build `rolldown` package with wasi binding (#6152) by @hyf0 ### 🚜 Refactor - share `FlatOptions` in whole build session (#6211) by @IWANABETHATGUY - remove unnecessary `comments` in ScopeHoistingFinalizerContext (#6205) by @IWANABETHATGUY - move external string/regex matching from JS to Rust (#6201) by @shulaoda - rename `cross_module_inline_const` to `cross_module_optimization` (#6193) by @IWANABETHATGUY - rename `class` and `function` visitor to `class_decl`, `function_decl` (#6176) by @IWANABETHATGUY - rolldown_error: tweak code (#6168) by @shulaoda - improve `BuildDiagnostic` (#6165) by @shulaoda - improve `RolldownBuild` (#6136) by @shulaoda - rolldown_error: remove unused `EventKind::IoError` (#6134) by @shulaoda - rename CustomPathsMut to NotifyPathsMutAdapter and move to utils (#6135) by @hyf0 ### 📚 Documentation - contrib-guide: add profiling instructions for macOS (#6183) by @sapphi-red - contrib-guide: update just commands (#6181) by @sapphi-red ### ⚡ Performance - pre calculate `side_effects_free_function_symbol_ref` (#6206) by @IWANABETHATGUY - parallel clone ast (#6167) by @IWANABETHATGUY - reserve capacity for rendered modules in `instantiate_chunk` (#6159) by @sapphi-red ### 🧪 Testing - hmr: ensure each test isolated to be able to be retryed (#6142) by @hyf0 ### ⚙️ Miscellaneous Tasks - deps: lock file maintenance npm packages (#6219) by @renovate[bot] - deps: lock file maintenance rust crates (#6217) by @renovate[bot] - deps: update github-actions (#6213) by @renovate[bot] - deps: lock file maintenance npm packages (#6215) by @renovate[bot] - deps: update github-actions (major) (#6214) by @renovate[bot] - tweak wordings (#6208) by @iiio2 - fix unused import warnings (#6196) by @shulaoda - correct deprecated JSDoc reference for jsx option (#6195) by @shulaoda - add `if: always()` to wasi-test (#6190) by @sapphi-red - skip `@rolldown/browser` build if no node related changes detected (#6189) by @sapphi-red - extract wasi build to reusable workflow (#6188) by @sapphi-red - deps: update dependency tsdown to v0.15.1 (#6184) by @renovate[bot] - deps: update dependency rolldown-plugin-dts to v0.16.5 (#6182) by @renovate[bot] - deps: update dependency rolldown-plugin-dts to v0.16.4 (#6180) by @renovate[bot] - dev: implement Debug trait for DevOptions (#6173) by @sapphi-red - deps: update dependency rolldown-plugin-dts to v0.16.3 (#6172) by @renovate[bot] - update @napi-rs/cli and js binding (#6157) by @Brooooooklyn - ci: ensure `@rolldown/browser` build without errors (#6155) by @hyf0 - ci: ensure running wasi tests correctly (#6154) by @hyf0 - add more tracing instrumentation (#6149) by @sapphi-red - extend timeout for rollup test (#6143) by @IWANABETHATGUY - rolldown_error: remove unnecessary `type_aliases.rs` (#6133) by @shulaoda
i looked for that but only found #4655 (reads like it should already work but test in vite-plugin-svelte still fails with latest rolldown-vite so maybe not. The dynamic chunk is still part of the vite manifest and in build output, although not referenced by other code) is there another PR or issue I can track for the progress of that? |
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This pr only marks empty function calls as side effects free so that the minifier could eliminate them if possible, even when binding is imported from other chunks.
Removing unused chunks will be done in the next pr.
related to #3403