Next.js Daily: Cache Fixes and Performance Improvements

Twenty pull requests merged on May 27th focused on critical cache bug fixes, React upgrades, and developer experience improvements. Key fixes addressed incorrect search params in cache storage and Firefox refresh loops in development mode.

Duration: PT1M52S

Episode overview

This episode is a short developer briefing from Next.js Daily.

It explains recent repository work in plain language.

  • Show: Next.js Daily
  • Published: 2026-05-27T10:03:18Z
  • Audio duration: PT1M52S

Transcript excerpt

This excerpt keeps the crawler page concise. Listen to the episode or use the RSS feed for the full update.

Good morning. This is Next.js Daily for May 27th, 2026.

Andrew Clark merged a critical bugfix for incorrect search params stored in cache. The issue caused static pages to store cache entries with wrong search strings, leading to stale parameters appearing in the browser address bar. The fix changes how cache writes are keyed to match request URLs properly.

Clark also merged prefetch App Shells on the client, an experimental feature that enables instant navigation to route shells even when concrete prefetches haven't completed. This addresses high-cardinality routes where prefetching every link is impractical.

Josh Story merged improvements to notFound recovery in error pathways, re-landing previous work that handles cache components more correctly during error states. This prevents hydration issues with incomplete flight data.

The team upgraded React from version d5736f09 to 75b0945b, bringing in upstream improvements across 70 files. Tobias Koppers fixed an unsound iterator implementation in Turbopack that was causing use-after-free panics during JSON serialization.

Tim Neutkens re-applied changes to write Pages Router export files directly to server/pages, fixing i18n export…

Nearby episodes from Next.js Daily

  1. Stability Backports for 16.2
  2. Developer Experience Overhaul
  3. Developer Experience and Performance Updates
  4. React Upgrade and Turbopack Fixes
  5. Cache Optimization and Developer Tools Update
  6. Developer Tools and Performance Optimization
  7. Skills Management Update
  8. Weekly Recap - Developer Tools & Build Improvements