Who contributed to Meta on June 10, 2026?

1 developer shipped this update, including josephsavona.

What were the notable Meta updates?

[compiler] Port React Compiler to Rust, [rust-compiler] Drop the regex dependency from the napi binary (#36727), and [rust-compiler] Add release profile: fat LTO, one codegen unit, strip (#36726).

REACT COMPILER GOES RUST, SHIPS 4MB LIGHTER

By RepoJournal · Filed 06:03 UTC on June 10, 2026 · About Meta

1 person shipped this

josephsavona @josephsavona 1 cited

Meta's experimental Rust port of React Compiler is live for feedback with all fixtures passing, while the team has already cut 1MB from the shipped binary by hand-parsing a single regex.

The React team shipped an early work-in-progress Rust port of React Compiler [1], built with heavy architectural guidance from humans but majority-coded by AI. No builds are available yet and there are no known gaps, but lurking bugs are possible until internal testing at Meta completes. The move is already paying dividends: the team dropped the entire regex dependency [2], which alone cost 570KB of binary bloat for a single pattern (`use memo if(condition)`). That hand-parsed replacement cascaded into another 430KB in dead code, landing the napi binary from 11.2MB down to 7.2MB on arm64 macOS [3] after they added fat LTO and symbol stripping to the release profile. Over on React Native, v0.86.0 is stabilizing with iOS text decoration finally honoring `textDecorationStyle` including the long-missing `wavy` variant [4], and the team compiled out the legacy RuntimeScheduler behind a feature flag [5]. A layout bug fix in Yoga ensures that freeing a child node now marks its parent dirty for recomputation [6], closing a correctness gap that existed since the original `YGNodeFree` implementation.

Action items

→ Monitor React Compiler Rust port for early feedback - all fixtures pass but internal testing at Meta still pending facebook/react [monitor]
→ Pin React Native to v0.86.0 if you use textDecorationStyle on iOS - wavy is now supported facebook/react-native [plan]
→ Review Yoga layout changes in your layout engine - parent dirty marking on child free is now required behavior facebook/react-native [monitor]

References

[1] [compiler] Port React Compiler to Rust ↗ facebook/react
[2] [rust-compiler] Drop the regex dependency from the napi binary (#36727) facebook/react
[3] [rust-compiler] Add release profile: fat LTO, one codegen unit, strip (#36726) facebook/react
[4] feat(ios): honor textDecorationStyle on Text decorations (#56769) facebook/react-native
[5] Compile out RuntimeScheduler_Legacy under RCT_REMOVE_LEGACY_ARCH (#57116) facebook/react-native
[6] YGNodeFree: mark parent dirty when child is freed facebook/react-native

Quick answers

What shipped in Meta on June 10, 2026?: Meta's experimental Rust port of React Compiler is live for feedback with all fixtures passing, while the team has already cut 1MB from the shipped binary by hand-parsing a single regex. In total, 8 commits and 3 pull requests landed.
Who contributed to Meta on June 10, 2026?: 1 developer shipped this update, including josephsavona.
What were the notable Meta updates?: [compiler] Port React Compiler to Rust, [rust-compiler] Drop the regex dependency from the napi binary (#36727), and [rust-compiler] Add release profile: fat LTO, one codegen unit, strip (#36726).

REACT FIBER FIXES SINGLETON PROPERTY BLEED, REACT NATIVE STRIPS DEAD CODE

React plugged a critical Fiber bug where singleton cleanup was nuking third-party attributes, while React Native dropped unused timing code from iOS binaries.

javascript 11 shipped 1-min read

Meta 1 day ago

REACT DEVTOOLS BRIDGE HARDENS AGAINST RECONNECTS AND CORRUPTION

React's DevTools layer just got bulletproof: hoxyq landed four interconnected patches that eliminate silent state corruption, validate invariants before mutation, and handle extension reconnects with message buffering and handshakes.

javascript 22 shipped 2-min read

Meta 2 days ago

REACT SERVER DOM TURBOPACK GETS DYNAMIC CHUNK MERGING

React's Turbopack integration now supports an experimental array format that lets you dynamically merge or unmerge chunks based on what's already loaded in the browser.

javascript 16 shipped 1-min read

Meta 3 days ago

React 19 Cuts Server Component Decoding Time, React Native Fixes requestIdleCallback Regression

React shipped performance wins across 19.0.8 and 19.1.9 while React Native patched a critical timeout bug that broke requestIdleCallback tasks.

javascript 22 shipped 2-min read

Elsewhere on the wire

AI Agents about 10 hours ago

CLAUDE OPUS 5 LANDS ACROSS THE STACK

The newest Anthropic model is now live in langchain, Cline, and llama-index, with native support for extended reasoning and 1M context windows.

ai-agents 28 shipped 1-min read

Local LLMs about 10 hours ago

OLLAMA LANDS LAGUNA SUPPORT AND CRUSHES MEMORY LEAKS WHILE SGLANG HITS V0.5.16 WITH CONFIDENCE-DRIVEN SPECULATIVE DECODING

Ollama shipped three critical performance and reliability fixes for Metal residency and concurrent access patterns, while SGL-Lang released 0.5.16 with a new speculative algorithm hitting 383.7 tok/s on DeepSeek-V4.