Who contributed to Vercel on June 13, 2026?

2 developers shipped this update, including lubieowoce and acdlite.

What were the notable Vercel updates?

[turbopack] Drop data while serializing in `next build` (#94561), refactor: process streaming prerenders more efficiently, and Generalize IsRootLayout prefetch hint to IsRootLayoutOrAbove.

@vercel

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The Wire · Showcase

TURBOPACK SLASHES BUILD MEMORY OVERHEAD. NEXT.JS STREAMING GETS LEANER

By RepoJournal · Filed 06:00 UTC on June 13, 2026 · About Vercel

2 people shipped this

lubieowoce @lubieowoce 1 cited

acdlite @acdlite 1 cited

Turbopack's serialization pipeline now drops data proactively during persistence, cutting memory consumption from 16.74 GB to 15.69 GB on canary builds.

The win comes from a fundamental rearchitecture of how Turbopack buffers data before writing to disk [1]. Because in-memory organization uses FxHash while disk output requires a different hash function and sorted order, the compiler was forced to hold everything in scratch buffers. Now it drops data as it flushes, treating persistence as a streaming operation instead of a batch job. Meanwhile, Next.js is simplifying its prerender pipeline [2] with a new chunk-callback pattern that eliminates redundant stream operations, making staged renders easier to implement without tee()ing streams twice. The App Router's route params also got smarter: IsRootLayout hints now generalize to IsRootLayoutOrAbove [3], letting the client correctly identify which params live above the topmost layout.tsx. On the Workflow side, hook conflict detection evolved from a boolean to a actionable handle [4] - getConflict() now returns the Run object that owns the token, not just a yes/no, so duplicate runs can inspect status, await results, or cancel competitors. Over in vercel/ai, the SDK removed deprecated experimental exports [5] as generateImage graduates from experimental to stable, and Fireworks now reports token usage in streaming responses [6]. Eve framework support shipped out of experimental [7], meaning teams can deploy Eve projects without the feature flag.

Action items

→ Test next build memory profiles against canary - persistence optimizations are live [ref:1] vercel/next.js [monitor]
→ Remove experimental_generateImage imports if you're on AI SDK 7 [ref:12] vercel/ai [plan]
→ Update workflow hooks to use getConflict() instead of hasConflict() [ref:6] vercel/workflow [plan]
→ Eve framework projects no longer need VERCEL_USE_EXPERIMENTAL_FRAMEWORKS flag [ref:17] vercel/vercel [monitor]

References

[1] [turbopack] Drop data while serializing in `next build` (#94561) vercel/next.js
[2] refactor: process streaming prerenders more efficiently ↗ vercel/next.js
[3] Generalize IsRootLayout prefetch hint to IsRootLayoutOrAbove ↗ vercel/next.js
[4] Replace hook.hasConflict with hook.getConflict() returning the conflicting Run (#2373) vercel/workflow
[5] fix: Remove deprecated experimental generateImage exports (#16017) vercel/ai
[6] @ai-sdk/fireworks@2.0.56 ↗ vercel/ai
[7] [@vercel/frameworks] graduate Eve from experimental frameworks (#16612) vercel/vercel

Quick answers

What shipped in Vercel on June 13, 2026?: Turbopack's serialization pipeline now drops data proactively during persistence, cutting memory consumption from 16.74 GB to 15.69 GB on canary builds. In total, 38 commits, 44 pull requests, and 19 releases landed.
Who contributed to Vercel on June 13, 2026?: 2 developers shipped this update, including lubieowoce and acdlite.
What were the notable Vercel updates?: [turbopack] Drop data while serializing in `next build` (#94561), refactor: process streaming prerenders more efficiently, and Generalize IsRootLayout prefetch hint to IsRootLayoutOrAbove.

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