# rspack v2.2.0-rc.0

- Product: rspack (https://whatsnew.fyi/product/rspack)
- Vendor: rspack
- Date: 2026-08-21
- Version: v2.2.0-rc.0
- Original notes: https://github.com/web-infra-dev/rspack/releases/tag/v2.2.0-rc.0
- Permalink: https://whatsnew.fyi/product/rspack/releases/v2.2.0-rc.0
- Labels: Pre-release

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

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- **added** — Integrate module code generation to the new cache
- **added** — Add fine-grained new cache options
- **changed** — Intern ArcPath as a single-allocation prehashed path
- **changed** — Use rayon parallel scheduling for new cache db
- **fixed** — CSS module dashed identifier and composes edge cases
- **fixed** — Make Module.blocks and Module.dependencies fail gracefully while the module graph is under construction
- **fixed** — Preserve reexport call context in concatenation
- **fixed** — Validate new cache version
- **fixed** — Use storage location for new cache
- **fixed** — Make compare_modules_by_pre_order_index_or_identifier a total order
- **fixed** — Await async modules in ProvidePlugin
- **fixed** — Refine binding code generation result error handling
- **fixed** — Restore tsconfig files as file dependencies

##### What's Changed
###### New Features 🎉
* feat: integrate module code generation to the new cache by @ahabhgk in https://github.com/web-infra-dev/rspack/pull/15194
* feat(cache): add fine-grained new cache options by @hardfist in https://github.com/web-infra-dev/rspack/pull/15261
###### Performance 🚀
* perf(paths): intern ArcPath as a single-allocation prehashed path by @stormslowly in https://github.com/web-infra-dev/rspack/pull/15205
* perf: use rayon parallel scheduling for new cache db by @ahabhgk in https://github.com/web-infra-dev/rspack/pull/15251
###### Bug Fixes 🐞
* fix(css): CSS module dashed identifier and composes edge cases by @intellild in https://github.com/web-infra-dev/rspack/pull/15223
* fix: make Module.blocks and Module.dependencies fail gracefully while the module graph is under construction by @upupming in https://github.com/web-infra-dev/rspack/pull/15177
* fix: preserve reexport call context in concatenation by @LingyuCoder in https://github.com/web-infra-dev/rspack/pull/15247
* fix(cache): validate new cache version by @hardfist in https://github.com/web-infra-dev/rspack/pull/15237
* fix(cache): use storage location for new cache by @hardfist in https://github.com/web-infra-dev/rspack/pull/15250
* fix(ids): make compare_modules_by_pre_order_index_or_identifier a total order by @noyobo in https://github.com/web-infra-dev/rspack/pull/15260
* fix: await async modules in ProvidePlugin by @HashemKhalifa in https://github.com/web-infra-dev/rspack/pull/15143
* fix: refine binding code generation result error handling by @intellild in https://github.com/web-infra-dev/rspack/pull/15253
* fix(resolver): restore tsconfig files as file dependencies by @stormslowly in https://github.com/web-infra-dev/rspack/pull/15264
###### Document 📖
* docs: improve dynamic import magic comments by @SyMind in https://github.com/web-infra-dev/rspack/pull/15233
* docs: improve devtool configuration guide by @chenjiahan in https://github.com/web-infra-dev/rspack/pull/15239
* docs: expand devtool reference by @chenjiahan in https://github.com/web-infra-dev/rspack/pull/15241
* docs: improve target configuration guide by @chenjiahan in https://github.com/web-infra-dev/rspack/pull/15248
###### Other Changes
* chore(vscode): use Rstack extension as default formatter by @chenjiahan in https://github.com/web-infra-dev/rspack/pull/15245
* chore: update Rstack to v0.6.2 by @chenjiahan in https://github.com/web-infra-dev/rspack/pull/15252
* ci: make sccache actually cache cargo check and clippy by @stormslowly in https://github.com/web-infra-dev/rspack/pull/15235
* chore: align agent guidance by @chenjiahan in https://github.com/web-infra-dev/rspack/pull/15268
* revert: remove faster module concatenation by @LingyuCoder in https://github.com/web-infra-dev/rspack/pull/15262

##### New Contributors
* @noyobo made their first contribution in https://github.com/web-infra-dev/rspack/pull/15260

**Full Changelog**: https://github.com/web-infra-dev/rspack/compare/v2.2.0-beta.1...v2.2.0-rc.0