Next.js: Turbopack Performance and Telemetry Updates
Three significant Turbopack improvements were merged, including a major telemetry fix for production builds and a proof-of-concept memory eviction system. The changes also optimize build output for adapter configurations.
Duration: PT1M40S
Episode overview
This episode is a short developer briefing from Next.js.
It explains recent repository work in plain language.
- Show: Next.js
- Published: 2026-05-11T10:01:45Z
- Audio duration: PT1M40S
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 your Next.js developer briefing for May 11th, 2026.
Luke Sandberg merged a critical fix for Turbopack feature usage telemetry. Production builds were never reporting telemetry data due to missing wiring between the Rust and JavaScript layers. The fix corrects how feature usage counts are computed - previously counting resolve events instead of unique importing…
Sandberg also merged a proof-of-concept implementation for task eviction in the turbo-tasks backend. After persistence snapshots complete, eligible tasks are now evicted from memory and restored from disk on access. The system supports multiple eviction levels - full removal, data-only, meta-only, or mixed eviction…
Niklas Mischkulnig merged a change preventing generation of next-server.js.nft.json files when using adapters, since adapters don't read these files. The update includes snapshot tests to prevent regressions on function size.
What's next: The memory eviction system needs LRU tracking and memory pressure feedback before production use. The telemetry fixes should improve build analytics accuracy for Turbopack users.
That's your Next.js update for today.
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