From 627dde7479eeed29d7b65bf8965069b08b7d9e52 Mon Sep 17 00:00:00 2001
From: Zeya Peng <zeyap@meta.com>
Date: Wed, 24 Jun 2026 12:42:43 -0700
Subject: [PATCH] do not post callback in AnimationBackendChoreographer.kt if
 featureflag is off

Summary:
## Changelog:

[Internal] - do not post callback in AnimationBackendChoreographer.kt if featureflag is off

AnimationBackendChoreographer is initialized in android regardless of featureflag, and it posts no-op per frame callbacks regardless, which is not ideal

Differential Revision: D109607144
---
 .../react/fabric/AnimationBackendChoreographer.kt        | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/fabric/AnimationBackendChoreographer.kt b/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/fabric/AnimationBackendChoreographer.kt
index 7bdeb518d808..c1134664e1a9 100644
--- a/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/fabric/AnimationBackendChoreographer.kt
+++ b/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/fabric/AnimationBackendChoreographer.kt
@@ -10,6 +10,7 @@ package com.facebook.react.fabric
 import com.facebook.proguard.annotations.DoNotStripAny
 import com.facebook.react.bridge.ReactApplicationContext
 import com.facebook.react.bridge.UiThreadUtil
+import com.facebook.react.internal.featureflags.ReactNativeFeatureFlags
 import com.facebook.react.modules.core.ReactChoreographer
 import com.facebook.react.uimanager.GuardedFrameCallback
 import java.util.concurrent.atomic.AtomicBoolean
@@ -41,9 +42,11 @@ internal class AnimationBackendChoreographer(
   private val paused: AtomicBoolean = AtomicBoolean(true)
 
   init {
-    // Register the self-reposting callback once, on the UI thread, so the
-    // callback queues are only ever mutated from the UI thread.
-    UiThreadUtil.runOnUiThread { postCallback() }
+    if (ReactNativeFeatureFlags.useSharedAnimatedBackend()) {
+      // Register the self-reposting callback once, on the UI thread, so the
+      // callback queues are only ever mutated from the UI thread.
+      UiThreadUtil.runOnUiThread { postCallback() }
+    }
   }
 
   fun resume() {