Next.js Daily: Weekly Recap - SWC Enhancements and Turbopack Performance
This week brought significant SWC improvements with new preset-env configuration options for automatic polyfill injection, plus major Turbopack performance optimizations and infrastructure stability fixes.
Duration: PT2M24S
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: 2026-04-05T10:01:25Z
- Audio duration: PT2M24S
Transcript excerpt
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Welcome to Next.js Daily. I'm your host with the weekly recap for March 29th through April 5th, 2026.
24 PRs merged, 81 additional commits this week.
**Features**
The headline feature is experimental SWC preset-env configuration options. PR 92272 adds `experimental.swcEnvOptions` to expose SWC's polyfill injection capabilities - including automatic core-js polyfills for methods like `Array.prototype.at()` and `Promise.withResolvers()`. This restores functionality that was…
Documentation expanded with a comprehensive view transitions guide, providing developers with practical implementation patterns for React's new transition APIs.
**Infrastructure & Performance**
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- Streaming Performance and View Transitions
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