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Summary: Pull Request resolved: https://github.com/facebook/react-native/pull/52240 Changes `VirtualView` to detect when its window is not in a focused window (e.g. scroll position or layout changes when it is blurred) and to instead dispatch an async `Prerender` event instead of a sync `Visible` event. This minimizes unnecessary main thread synchronous work that is needed for a view that is not important to the user experience. Changelog: [Internal] Reviewed By: mdvacca Differential Revision: D77261958 fbshipit-source-id: 32acef9bc938005a0d73c5166f1741aebadf23bb
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