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What we just announced at React Conf 1/ The New Architecture is now the ONLY supported Architecture for React Native. Starting with v0.82, you won't be able to opt-out from New Architecture anymore.

Removing the Legacy Architecture comes with clear benefits: - Smaller app bundles, up to 1Mb reduction - Faster from-source builds (from 300s to 140s on iOS) - Simpler mental model If you haven't enabled New Architecture yet, we recommend upgrading to 0.81, enabling, then moving to 0.82.

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2/ Hermes V1 Today we also announced Hermes V1, the next evolution of our JavaScript Engine! Hermes V1 shows a 60% avg improvement on synthetic benchmarks, includes improved modern JS support, and ships today in 0.82 as experimental.

4/ Web Performance APIs and New Tooling It's easier than ever to understand your app's performance thanks to newly added Performance APIs from the web. These provide new runtime profiling capabilities, and work in both development and production builds.