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Summary: The previous diff shows how `overflowInset` could improve hit test algorithm performance. This diff adds experiment to it in order to: 1. Understand the perf improvement in production 2. Provide quick way to rollback in production -- the changes are used by FB4A as well as VR 3. The changes will pass more instructions over JNI, which may have impact on perf. To share the MC param values in both Java and C++ side, the value is hosted by `ReactFeatureFlags` and fetched in `FbReactInstanceHolder`. Changelog: [Internal] Reviewed By: mdvacca Differential Revision: D33179310 fbshipit-source-id: 327100d41f7b5a668ff0d2afabcdd1fc16cb5a18
Building React Native for Android
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