Who contributed to Meta on August 4, 2026?

5 developers shipped this update, including hoxyq, Hanno J. Gödecke, Maciej Jastrzębski, RealBhupesh, and Dawid Malecki.

What were the notable Meta updates?

[DevTools] Remove Timeline profiler tab, suggest React Performance tracks, [DevTools] Remove the dead Timeline profiler code, and [DevTools] Deduplicate error reporting.

REACT DEVTOOLS KILLS TIMELINE PROFILER, PIVOTS TO PERFORMANCE PANEL

By RepoJournal · Filed 06:58 UTC on August 4, 2026 · About Meta

5 people shipped this

hoxyq @hoxyq 4 cited

Hanno J. Gödecke @hannojg 1 cited

Maciej Jastrzębski @mdjastrzebski 1 cited

RealBhupesh @RealBhupesh 1 cited

Dawid Malecki @coado 1 cited

React DevTools is retiring its built-in Timeline profiler and steering users to the browser's native Performance tracks instead, ripping out 74 files of dead code in the process.

The shift comes in two coordinated moves. First, the Timeline tab itself vanishes [1], replaced with a smart redirect: if you're on React 19.2 or later, DevTools will prompt you to use the Performance panel for tracing; everyone else gets nudged to upgrade [4]. Immediately behind it, React strips out the entire Timeline infrastructure [2], deleting `packages/react-devtools-timeline`, the profiling hooks backend, and all the plumbing that existed solely to feed that tab. This is a clean break, not a deprecation. In parallel, DevTools fixes a nasty bug where every ErrorBoundary instance was reporting the same error independently [3], drowning developers in duplicate alerts. Meanwhile, React Native patches critical Image component crashes on Android when props 2.0 is enabled [5], and on iOS extracts props once per render instead of repeatedly [6], matching the Android pattern. A FileReader fix [7] prevents premature blob deallocation during async reads. The Native team also fixes iOS Codegen to discover third-party components without iOS configs [8], and SwiftPM builds now try the React Native Maven mirror first before falling back to Central [9].

Action items

→ If debugging React 19.2+, switch from DevTools Timeline to browser Performance panel immediately facebook/react [immediate]
→ On React Native, enable props 2.0 feature flag and verify Image component stability in prerelease facebook/react-native [plan]
→ Monitor FileReader + Blob usage for premature deallocations if using async reads facebook/react-native [monitor]

References

[1] [DevTools] Remove Timeline profiler tab, suggest React Performance tracks ↗ facebook/react
[2] [DevTools] Remove the dead Timeline profiler code ↗ facebook/react
[3] [DevTools] Deduplicate error reporting ↗ facebook/react
[4] [DevTools] Remove Timeline profiler tab, suggest React Performance tracks (#37186) facebook/react
[5] fix(android): Image `defaultSource` & `loadingIndicatorSrc` broken with props 2.0 (#55210) facebook/react-native
[6] fix(ios): extract Image.ios.js props once (#57710) facebook/react-native
[7] Fix premature blob deallocation during FileReader reads (#57796) facebook/react-native
[8] Fix iOS Codegen fallback for libraries without an iOS config (#57790) facebook/react-native
[9] Download artifacts from Mirror first on SwiftPM builds (#57763) facebook/react-native

Quick answers

What shipped in Meta on August 4, 2026?: React DevTools is retiring its built-in Timeline profiler and steering users to the browser's native Performance tracks instead, ripping out 74 files of dead code in the process. In total, 12 commits and 4 pull requests landed.
Who contributed to Meta on August 4, 2026?: 5 developers shipped this update, including hoxyq, Hanno J. Gödecke, Maciej Jastrzębski, RealBhupesh, and Dawid Malecki.
What were the notable Meta updates?: [DevTools] Remove Timeline profiler tab, suggest React Performance tracks, [DevTools] Remove the dead Timeline profiler code, and [DevTools] Deduplicate error reporting.

REACT DEVTOOLS GAINS PROFILER SEARCH, REACT NATIVE FIXES ANIMATION INITIALIZATION

React's Profiler just got the component search feature developers have been requesting, while React Native patches a critical animation backend timing issue across 13 commits and 2 PRs.

javascript 16 shipped

Meta Aug 5

REACT NATIVE PLUGS TWO CRITICAL CRASHES ACROSS ANDROID AND iOS

A percentage borderRadius on Android Images and a Debug/Release build swap on iOS are both fixed overnight, clearing two silent production killers from the pipeline.

javascript 5 shipped

Meta Aug 3

REACT NATIVE QUIETLY UPGRADES CODE FORMATTER INTERNALS

One commit landed on React Native master overnight, and it's all infrastructure.

javascript 1 shipped

Meta Aug 2

REACT NATIVE FIXES KEYBOARD ACCESS ON IOS MARKETPLACE

React Native patched a Full Keyboard Access regression that broke interactive row focus on iOS Marketplace.

javascript 1 shipped

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ai-agents 54 shipped

Local LLMs Aug 6

OLLAMA FIXES KV CACHE CORRUPTION, LLAMA.CPP HARDENS FILE SEARCH, VLLM KILLS MOE LEGACY CODE

Ollama patched a critical cache corruption bug that corrupts lazy snapshots during multi-request prefills, while llama.cpp hardened Windows junction traversal and vLLM removed 14 hardcoded MoE shards across quantization methods.