## [1.0.0-beta.54] - 2025-12-11

⏱️ Plugin Timing Analysis
- Added `checks.pluginTimings` option to emit warnings when plugins significantly impact build performance
- More details: https://rolldown.rs/options/checks#plugintimings
<img width="834" height="119" alt="image" src="https://github.com/user-attachments/assets/e819f906-6192-4503-8d5c-854fa92ecb45" />

> [!WARNING]
> For hooks using `ctx.resolve()` or `ctx.load()`, the reported time includes waiting for other plugins, which may overestimate that plugin's actual cost.
>
> Additionally, since plugin hooks execute concurrently, the statistics represent accumulated time rather than wall-clock time. The measured duration also includes Rust-side processing overhead, Tokio async scheduling overhead, NAPI data conversion overhead, and JavaScript event loop overhead.

### 🚀 Features

- rolldown_plugin_vite_reporter: add newline after build summary for better log separation (#7458) by @shulaoda
- plugin: collect plugin hook execution timings (#7364) by @shulaoda
- test-dev-server: reload page when detecting hmr reload message (#7422) by @hyf0
- rolldown_plugin_vite_dynamic_import_vars: add transform-based v2 implementation (#7400) by @shulaoda
- rolldown_plugin_vite_import_glob: add transform-based v2 implementation (#7394) by @shulaoda
- rolldown_plugin_vite_wasm_helper: add v2 implementation (#7402) by @shulaoda
- expose error location and context fields on JS API error objects (#7341) by @Copilot
- add `CIRCULAR_REEXPORT` error (#7337) by @Copilot
- support emit prebuilt chunk (#7277) by @Copilot

### 🐛 Bug Fixes

- preserve object key order when parse json with serde_json (#7443) by @IWANABETHATGUY
- improve JSON parsing with serde_json to emit proper diagnostic (#7442) by @IWANABETHATGUY
- deconflict external symbols in CJS modules (#7447) by @IWANABETHATGUY
- rolldown_plugin_vite_transform,rolldown_plugin_vite_resolve: enable `yarnPnp` option when pnp is detected (#5791) by @sapphi-red
- skip deconflicting top-level symbols for CJS modules (#7425) by @IWANABETHATGUY
- rolldown_plugin_esm_external_require: run resolveId hook before other plugins (#7426) by @shulaoda
- avoid duplicate underscores in legitimized identifiers (#7418) by @IWANABETHATGUY
- use `process.on('exit')` instead of `signal-exit` on webcontainers (#7421) by @sapphi-red
- dev: remove `imports` when an import is removed (#7348) by @sapphi-red
- bench: access latency.mean instead of mean in tinybench result (#7417) by @shulaoda
- path compression in symbol linking (#7392) by @IWANABETHATGUY
- rolldown_plugin_vite_resolve: add RwLock to avoid clearing cache while resolving (#7386) by @sapphi-red
- handle JSON prototype properties correctly (#7383) by @IWANABETHATGUY
- preserve entry signature strict chunk merging (#7343) by @IWANABETHATGUY
- support eliminating multiple unused dynamic imports in a single statement (#7361) by @IWANABETHATGUY
- eliminate unreachable dynamic entry (#7356) by @IWANABETHATGUY
- `NormalizedInputOptions#cwd` should always exists (#7360) by @hyf0
- cli: support multiple comma-separated define arguments (#7340) by @Copilot
- remove redundant symbol param in __reExport runtime helper (#7346) by @IWANABETHATGUY
- always use __export for empty namespace objects when symbols enabled (#7345) by @IWANABETHATGUY
- relax the restriction of preserveEntrySignatures when merging chunks (#7339) by @IWANABETHATGUY

### 🚜 Refactor

- builtin-plugin: make config parameter required for vite plugins (#7451) by @shulaoda
- move esbuild test related scripts to `scripts/src/esbuild-tests` (#7377) by @sapphi-red
- rewrite gen-esbuild-test in TypeScript (#7376) by @sapphi-red
- remove unnecessary Option in current_stmt_idx (#7359) by @IWANABETHATGUY
- move more code into chunk optimizer (#7335) by @IWANABETHATGUY

### 📚 Documentation

- checks: clarify pluginTimings measures CPU time due to concurrent execution (#7448) by @shulaoda
- checks: add accuracy note to pluginTimings documentation (#7441) by @shulaoda
- development-guide: add esbuild test description (#7439) by @sapphi-red
- checks: expand `pluginTimings` documentation with detection mechanism (#7428) by @shulaoda
- add checks options documentation (#7427) by @shulaoda
- development-guide: add test262 integration test description (#7430) by @sapphi-red
- guide: fix grammer in getting-started (#7331) by @jakeparis

### 🧪 Testing

- rollup-tests: make `--grep` work and document it (#7431) by @sapphi-red
- add a way to run some test262 test cases by name (#7429) by @sapphi-red
- rolldown_plugin_vite_dynamic_import_vars: add test cases for v2 implementation (#7401) by @shulaoda
- rolldown_plugin_vite_import_glob: add test cases for v2 implementation (#7395) by @shulaoda
- triage new esbuild tests (#7405) by @sapphi-red
- hmr: delete file used (#5933) by @sapphi-red
- watch: add `watchChange` hook `create` / `delete` tests (#7349) by @sapphi-red
- hmr: delete file not used anymore (#5932) by @sapphi-red
- triage esbuild failed reasons (#7391) by @sapphi-red
- change esbuild tests stats and diff generation (#7379) by @sapphi-red
- dev: add `continuous generate hmr patch` and `debounce bundle` tests (#7368) by @hyf0
- add new esbuild tests (#7353) by @sapphi-red

### ⚙️ Miscellaneous Tasks

- setup Node before updating snapshots for test262 update (#7435) by @sapphi-red
- run tests when submodules are updated (#7455) by @sapphi-red
- exclude NUL path pattern to prevent crash on Windows (#7450) by @IWANABETHATGUY
- run cargo-test for esbuild script changes and update esbuild snapshot (#7440) by @sapphi-red
- jsx_import_meta tests to `ignoreReasons` due to architectural limitation (#7434) by @Copilot
- deps: update dependency oxlint-tsgolint to v0.8.5 (#7433) by @renovate[bot]
- update test dependencies automatically (#7432) by @sapphi-red
- remove unused code (#7420) by @IWANABETHATGUY
- add back `just update-esbuild-diff` and add it to CI (#7404) by @sapphi-red
- deps: update oxc-resolver to 11.15.0 (#7415) by @shulaoda
- deps: update rust crate napi to v3.7.0 (#7393) by @renovate[bot]
- fix esbuild compatibility metrics calculation (#7390) by @sapphi-red
- support `tsconfig: true` in rust tests (#7389) by @sapphi-red
- hide oxc runtime in snapshots (#7388) by @sapphi-red
- deps: update oxc to v0.102.0 (#7385) by @camc314
- improve esbuild tests to download snapshots automatically (#7378) by @sapphi-red
- deps: update dependency tinybench to v6 (#7371) by @renovate[bot]
- deps: update actions/checkout action to v6 (#7370) by @renovate[bot]
- deps: update rust crates (#7367) by @renovate[bot]
- deps: update dependency oxlint to v1.32.0 (#7374) by @renovate[bot]
- deps: update dependency oxlint-tsgolint to v0.8.4 (#7373) by @renovate[bot]
- node/test-dev-server: support using custom html file (#7357) by @hyf0
- test: setup browser-based e2e test for `test-dev-server` (#7351) by @hyf0
- pin pnpm to version 10.23.0 (#7369) by @IWANABETHATGUY
- deps: update dependency rolldown-plugin-dts to v0.18.3 (#7372) by @renovate[bot]
- deps: update github-actions (#7365) by @renovate[bot]
- deps: update npm packages (#7366) by @renovate[bot]
- polish the comments about `SymbolRefFlags` (#7358) by @IWANABETHATGUY
- deps: update dependency rolldown-plugin-dts to v0.18.2 (#7355) by @renovate[bot]
- fix esbuild test generation script (#7352) by @sapphi-red
- apply cargo shear suggestion (#7347) by @IWANABETHATGUY
- deps: update oxc to v11.15.0 (#7344) by @renovate[bot]
- deps: update dependency @napi-rs/cli to v3.5.0 (#7338) by @renovate[bot]
- deps: update dependency oxlint to v1.31.0 (#7305) by @renovate[bot]
- update rollup-tests results (#7333) by @sapphi-red
- update rollup-tests Rollup version (#7332) by @sapphi-red
- add ignore config for test262 submodule (#7326) by @Copilot

### ❤️ New Contributors

* @jakeparis made their first contribution in [#7331](#7331)

Co-authored-by: shulaoda <[email protected]>