The `StmtInfoIdx`​ is only used in `scan`​ phase, we could record the current `idx` for each top level `StmtInfo` instead of use another field in `StmtInfo` to record it.
Removing `StmtInfoIdx`​ could reduce the memory usage of `StmtInfo`​ , which was created a lot during bundling.

## [1.0.0-beta.39] - 2025-09-22

⚡ MacOS Performance Boost

- 10%-30% faster bundling
- Up to 45% in extreme cases

### 🚀 Features

- rolldown: oxc v0.90.0 + other oxc crate updates (#6274) by @Boshen
- support ignoring `/* @vite-ignore */` comment for dynamic imports (#6264) by @IWANABETHATGUY
- dev: merge mergeable queued tasks into one (#6253) by @hyf0
- dev: ignore self imports when computing update for invalidate (#6252) by @sapphi-red
- support `#__NO_SIDE_EFFECTS__` annotation for export default function declaration (#6239) by @IWANABETHATGUY
- rolldown_plugin_dynamic_import_vars: respect `@vite-ignore` comment (#6240) by @shulaoda
- rolldown_plugin_import_glob: support `exhaustive` option (#6236) by @shulaoda
- cross chunk /* @__NO_SIDE_EFFECTS__ */ support (#6207) by @IWANABETHATGUY
- rolldown_plugin_react_refresh_wrapper: make the plugin callable (#6229) by @sapphi-red

### 🐛 Bug Fixes

- handle optional chaining in scope hoisting member expression rewriting (#6278) by @shulaoda
- release: Fix semver commit release format to use plus instead of dash (#6273) by @Copilot
- dev: `ensure_latest_build_output` should work correctly when `eagerBuild: false` (#6262) by @hyf0
- browser: does not work in stackblitz (#6257) by @shulaoda
- only inline constants that are not reassigned (#6247) by @IWANABETHATGUY
- handle lexical declarations in root scope (#6230) by @IWANABETHATGUY

### 🚜 Refactor

- move oxc runtime helper generation from `build.rs` to task generator (#6284) by @shulaoda
- remove unused `SpanExt` (#6266) by @IWANABETHATGUY
- remove `@rolldown-ignore` ignore comment support (#6265) by @IWANABETHATGUY
- enhance CommonJsAstType to track property names (#6250) by @IWANABETHATGUY
- simplify usage for `Address::from` (#6245) by @IWANABETHATGUY
- remove `stmt_info_idx` in StmtInfo (#6244) by @IWANABETHATGUY
- extract `CrossModuleOptimizationRunnerContext` in cross_module_optimization (#6243) by @IWANABETHATGUY
- dev: task-queue based deisgn (#6233) by @hyf0
- extract immutable context from AstScanner (#6238) by @IWANABETHATGUY
- dev: rename `WatcherEventService` to `BuildDriverService` (#6232) by @hyf0
- move FlatOptions to rolldown_common (#6235) by @IWANABETHATGUY
- extract mutable state from ScopeHoistingFinalizerContext (#6234) by @IWANABETHATGUY
- wait `this.load` using futures instead of callbacks (#6222) by @sapphi-red
- rolldown_plugin_transform: remove unused `runtime_resolve_base` option (#6226) by @sapphi-red

### 📚 Documentation

- add "edit this page on GitHub" button (#6241) by @siaeyy

### ⚡ Performance

- rolldown: minor performance optimization (#6271) by @Brooooooklyn
- rolldown: take advantage of tokio blocking threads (#6270) by @Brooooooklyn

### 🧪 Testing

- dev: add rebuild after HMR case (#6260) by @sapphi-red
- dev: support full reload in tests (#6259) by @sapphi-red
- dev: extract waitFor from waitForPathExists (#6261) by @sapphi-red
- add class like cases for empty function optimizations (#6248) by @sapphi-red

### ⚙️ Miscellaneous Tasks

- deps: update github-actions (#6298) by @renovate[bot]
- deps: update dependency dprint/dprint-plugin-typescript to v0.95.11 (#6296) by @renovate[bot]
- deps: update dependency dprint/dprint-plugin-markdown to v0.19.0 (#6295) by @renovate[bot]
- deps: update dependency g-plane/pretty_yaml to v0.5.1 (#6294) by @renovate[bot]
- use a forked version of openharmony-rs/setup-ohos-sdk (#6290) by @Boshen
- deps: update dependency tsdown to v0.15.4 (#6286) by @renovate[bot]
- deps: update dependency rolldown-plugin-dts to v0.16.7 (#6285) by @renovate[bot]
- rust: continue to make `cargo publish --workspace` work (#6281) by @Boshen
- deps: update dependency tsdown to v0.15.3 (#6280) by @renovate[bot]
- rust: fixes for `cargo publish --dry-run --workspace` (#6279) by @Boshen
- deps: update dependency rust to v1.90.0 (#6277) by @renovate[bot]
- deps: update dependency rolldown-plugin-dts to v0.16.6 (#6276) by @renovate[bot]
- adding tracing for all sub stage in LinkStage:link (#6268) by @IWANABETHATGUY
- deps: update oxc-project/setup-node action to v1.0.4 (#6258) by @renovate[bot]
- deps: update github-actions (#6249) by @renovate[bot]
- deps: update dependency tsdown to v0.15.2 (#6242) by @renovate[bot]
- dev: output error when the initial bundle failed (#6228) by @sapphi-red

### ❤️ New Contributors

* @siaeyy made their first contribution in [#6241](#6241)