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Eric Hartzog
0ef73f2a82
Summary: Brings back a small performance win of avoiding starting/stopping a batch if the queue is empty. ## Background This was attempted previously but it happened to expose a single frame animation visual regression in VR. 1. First added in D36298399 (https://github.com/facebook/react-native/commit/55ee8ce0c4157ce5d8a95eaa60b9945b435fc988), reverted in D36378363 2. Added in a different form in D36338606 (https://github.com/facebook/react-native/commit/35e2a63b8d45a52445266bd8106600cb49081a59), reverted in D36479089 (https://github.com/facebook/react-native/commit/a4690d054ff636a15f14f086acd44656412441ec) 3. Root cause of the visual regressions introduced was fixed in D36612758 (https://github.com/facebook/react-native/commit/40f4c662bc7a66e5caea4909d74f435f5b72190c) Now that we've fixed the root cause of the visual regression, this is safe to restore. Changelog: [Internal] Reviewed By: JoshuaGross Differential Revision: D36670591 fbshipit-source-id: 42b6bc9c7764484f2dbb9edb122780a91b7393b4