Sourced from rolldown's releases.

v1.0.0-beta.59

[1.0.0-beta.59] - 2026-01-07

⚡ Inline Dynamic Imports for Statically Imported Modules

• When a module is already statically imported, dynamic imports to that same module are now inlined instead of creating a separate chunk
• REPL: before and after

Before:

import { foo } from './foo.js'
console.log(foo)
import('./foo.js').then(mod => console.log(mod.foo))

Previously, import('./foo.js') would create a separate async chunk.

After:

var foo_exports = /* @__PURE__ */ __exportAll({ foo: () => foo });
const foo = "foo";
console.log(foo);
Promise.resolve().then(() => foo_exports).then((mod) => console.log(mod.foo));

The dynamic import is inlined since foo.js is already statically imported.

🚀 Features

• plugin_timings: add 3s threshold and doc link to warning message (#7741) by @​shulaoda
• improve treeshaking logic to handle empty parameter list in dynamic import .then() callbacks (#7781) by @​Copilot
• dev/lazy: don't include already executed modules (#7745) by @​hyf0
• dev/lazy: support dynamic import(..) (#7726) by @​hyf0
• inline dynamic imports that imports statically imported modules (#7742) by @​IWANABETHATGUY
• option: add experimental option to control chunk optimization (#7738) by @​IWANABETHATGUY

🐛 Bug Fixes

• inline dynamic entry to user defined entry with esm wrap kind (#7783) by @​IWANABETHATGUY
• use canonical namespace reference for property access (#7777) by @​IWANABETHATGUY
• dynamic entry merged into common chunk with cjs and esm wrap kind (#7771) by @​IWANABETHATGUY
• tla: should not await non-tla-related modules (#7768) by @​hyf0
• dynamic entry captured by common chunk with CJS format (#7757) by @​IWANABETHATGUY
• module_loader: mark emitted chunks as user-defined entry when already loaded (#7765) by @​shulaoda
• normalize preserveModulesRoot path (#7737) by @​IWANABETHATGUY
• linker: resolve race condition in side effects computation for export-star (#7728) by @​camc314

🚜 Refactor

• plugin_timings: filter out plugins with duration < 1s from timing warnings (#7785) by @​shulaoda
• module_loader: remove unnecessary collect before extend (#7769) by @​shulaoda

... (truncated)

Sourced from rolldown's changelog.

[1.0.0-beta.59] - 2026-01-07

🚀 Features

• plugin_timings: add 3s threshold and doc link to warning message (#7741) by @​shulaoda
• improve treeshaking logic to handle empty parameter list in dynamic import .then() callbacks (#7781) by @​Copilot
• dev/lazy: don't include already executed modules (#7745) by @​hyf0
• dev/lazy: support dynamic import(..) (#7726) by @​hyf0
• inline dynamic imports that imports statically imported modules (#7742) by @​IWANABETHATGUY
• option: add experimental option to control chunk optimization (#7738) by @​IWANABETHATGUY

🐛 Bug Fixes

• inline dynamic entry to user defined entry with esm wrap kind (#7783) by @​IWANABETHATGUY
• use canonical namespace reference for property access (#7777) by @​IWANABETHATGUY
• dynamic entry merged into common chunk with cjs and esm wrap kind (#7771) by @​IWANABETHATGUY
• tla: should not await non-tla-related modules (#7768) by @​hyf0
• dynamic entry captured by common chunk with CJS format (#7757) by @​IWANABETHATGUY
• module_loader: mark emitted chunks as user-defined entry when already loaded (#7765) by @​shulaoda
• normalize preserveModulesRoot path (#7737) by @​IWANABETHATGUY
• linker: resolve race condition in side effects computation for export-star (#7728) by @​camc314

🚜 Refactor

• plugin_timings: filter out plugins with duration < 1s from timing warnings (#7785) by @​shulaoda
• module_loader: remove unnecessary collect before extend (#7769) by @​shulaoda
• rename _id suffixes to _idx for oxc_index types (#7767) by @​IWANABETHATGUY
• remove duplicate preserve_entry_signatures from AddEntryModuleMsg (#7762) by @​shulaoda
• module_loader: pass user_defined_entries by reference (#7756) by @​shulaoda
• dev/lazy: get proxy entry's ResolvedId correctly (#7746) by @​hyf0
• simplify try_rewrite_import_expression control flow (#7753) by @​IWANABETHATGUY
• module_loader: remove unnecessary dynamic import handling for runtime module (#7754) by @​shulaoda
• inline __toDynamicImportESM (#7747) by @​IWANABETHATGUY
• use From impl for ModuleLoaderOutput conversion (#7732) by @​shulaoda
• remove duplicate fields from ModuleLoader (#7731) by @​shulaoda
• tweak resolve_user_defined_entries (#7727) by @​shulaoda

📚 Documentation

• add rolldown-string reference to native MagicString compatibility section (#7778) by @​Copilot
• improve comments for export star side effects handling (#7730) by @​IWANABETHATGUY

🧪 Testing

• use assertion instead of console.log for some testcase (#7744) by @​IWANABETHATGUY

⚙️ Miscellaneous Tasks

• tweak some output.dynamicImportInCjs related rollup test results (#7776) by @​sapphi-red
• mark esbuild/dce/dce_of_symbol_ctor_call as passed (#7775) by @​sapphi-red

... (truncated)

• 25ffe2a release: v1.0.0-beta.59 (#7786)
• c216b90 refactor(plugin_timings): filter out plugins with duration < 1s from timing w...
• 6d4272c fix: inline dynamic entry to user defined entry with esm wrap kind (#7783)
• 71d8ce0 feat(plugin_timings): add 3s threshold and doc link to warning message (#7741)
• bf9cc26 feat: improve treeshaking logic to handle empty parameter list in dynamic imp...
• e5a047d fix: use canonical namespace reference for property access (#7777)
• fe2142b docs: add rolldown-string reference to native MagicString compatibility secti...
• 8a07413 fix: dynamic entry merged into common chunk with cjs and esm wrap kind (#7771)
• eb312ba chore: tweak some output.dynamicImportInCjs related rollup test results (#7...
• 2e27dba chore: mark esbuild/dce/dce_of_symbol_ctor_call as passed (#7775)
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