What were the notable Meta updates?

ArrayBuffer support to ObjC TurboModules.

REACT NATIVE BRINGS ZERO-COPY BUFFERS TO OBJC TURBOMMODULES

By RepoJournal · Filed 06:02 UTC on June 29, 2026 · About Meta

React Native is closing the performance gap for iOS native code with direct ArrayBuffer support in TurboModules, letting you pass binary data to Objective-C without serialization overhead.

React Native shipped ArrayBuffer support for ObjC TurboModules [1], mirroring the C++ implementation already in place. This means your native iOS modules can now accept and return binary data directly through JSI, eliminating the copy-on-every-call penalty that killed performance on image processing, audio, and encryption workloads. The codegen system now understands ArrayBufferTypeAnnotation for both parameters and return types, automatically wiring up NSMutableData conversions [1]. The conversion layer uses zero-copy semantics via NSMutableData's initWithBytesNoCopy, so a 10MB image buffer stays a 10MB image buffer end-to-end. If you've been bridging binary data through base64 or byte arrays as a workaround, this is the upgrade path you've been waiting for.

Action items

→ Update React Native and test ArrayBuffer TurboModule definitions in your native modules facebook/react-native [plan]
→ Review codegen specs for binary-heavy modules (image, audio, crypto) to adopt NSMutableData params facebook/react-native [monitor]

References

[1] ArrayBuffer support to ObjC TurboModules facebook/react-native

Quick answers

What shipped in Meta on June 29, 2026?: React Native is closing the performance gap for iOS native code with direct ArrayBuffer support in TurboModules, letting you pass binary data to Objective-C without serialization overhead. In total, 1 commits landed.
What were the notable Meta updates?: ArrayBuffer support to ObjC TurboModules.

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