# Next.js v16.4.0-canary.15

- Product: Next.js (https://whatsnew.fyi/product/next-js)
- Vendor: Vercel
- Date: 2026-09-02
- Version: v16.4.0-canary.15
- Original notes: https://github.com/vercel/next.js/releases/tag/v16.4.0-canary.15
- Permalink: https://whatsnew.fyi/product/next-js/releases/v16.4.0-canary.15
- 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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- **changed** — Reduce Turbopack cache size with per-family compression
- **changed** — Bump swc to v77
- **changed** — Upgrade React from ff7445e6-20260831 to 21c89c9f-20260901
- **changed** — Implement parent_count-driven garbage collection in turbo-tasks-backend
- **removed** — Remove the worker thread for turbopack builds

###### Misc Changes

- Reduce Turbopack cache size with per-family compression: #97714
- [test] Skip hooks of suites skipped by a lazy `@force-gate`: #98169
- docs: local development: Rewrite docker section, add Windows Dev Drive and WSL2 instructions: #98164
- Bump swc to v77: #97407
- Upgrade React from `ff7445e6-20260831` to `21c89c9f-20260901`: #98147
- turbo-tasks-backend: parent_count-driven garbage collection: #97282
- Remove the worker thread for turbopack builds: #96862
- turbo-tasks-malloc: address review feedback on #97761: #98153

###### Credits 

Huge thanks to @lukesandberg, @eps1lon, @bgw, and @mischnic for helping!