delete background executor

packages/react-native/React/Fabric/RCTSurfacePresenter.mm

@@ -43,33 +43,6 @@
 using namespace facebook;
 using namespace facebook::react;
 
-static dispatch_queue_t RCTGetBackgroundQueue()
-{
-  static dispatch_queue_t queue;
-  static dispatch_once_t onceToken;
-  dispatch_once(&onceToken, ^{
-    dispatch_queue_attr_t attr =
-        dispatch_queue_attr_make_with_qos_class(DISPATCH_QUEUE_SERIAL, QOS_CLASS_USER_INTERACTIVE, 0);
-    queue = dispatch_queue_create("com.facebook.react.background", attr);
-  });
-  return queue;
-}
-
-static BackgroundExecutor RCTGetBackgroundExecutor()
-{
-  return [](std::function<void()> &&callback) {
-    if (RCTIsMainQueue()) {
-      callback();
-      return;
-    }
-
-    auto copyableCallback = callback;
-    dispatch_async(RCTGetBackgroundQueue(), ^{
-      copyableCallback();
-    });
-  };
-}
-
 @interface RCTSurfacePresenter () <RCTSchedulerDelegate, RCTMountingManagerDelegate>
 @end
 
@@ -288,10 +261,6 @@ - (RCTScheduler *)_createScheduler
   toolbox.runtimeExecutor = runtimeExecutor;
   toolbox.bridgelessBindingsExecutor = _bridgelessBindingsExecutor;
 
-  if (ReactNativeFeatureFlags::enableBackgroundExecutor()) {
-    toolbox.backgroundExecutor = RCTGetBackgroundExecutor();
-  }
-
   toolbox.asynchronousEventBeatFactory =
       [runtimeExecutor](const EventBeat::SharedOwnerBox &ownerBox) -> std::unique_ptr<EventBeat> {
     auto runLoopObserver =

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/internal/featureflags/ReactNativeFeatureFlags.kt

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<9e8a8beb3d769dbf5067ea8f7f7e083a>>
+ * @generated SignedSource<<e7aaf58d91c8e25685f2a3ec5ca171a9>>
  */
 
 /**
@@ -58,12 +58,6 @@ public object ReactNativeFeatureFlags {
   @JvmStatic
   public fun destroyFabricSurfacesInReactInstanceManager(): Boolean = accessor.destroyFabricSurfacesInReactInstanceManager()
 
-  /**
-   * Enables the use of a background executor to compute layout and commit updates on Fabric (this system is deprecated and should not be used).
-   */
-  @JvmStatic
-  public fun enableBackgroundExecutor(): Boolean = accessor.enableBackgroundExecutor()
-
   /**
    * Clean yoga node when <TextInput /> does not change.
    */

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/internal/featureflags/ReactNativeFeatureFlagsCxxAccessor.kt

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<42c6f880b8d84f9c7b232f8ea392eed2>>
+ * @generated SignedSource<<bd5baae4bc2e8a619f99dea15766e803>>
  */
 
 /**
@@ -25,7 +25,6 @@ public class ReactNativeFeatureFlagsCxxAccessor : ReactNativeFeatureFlagsAccesso
   private var allowRecursiveCommitsWithSynchronousMountOnAndroidCache: Boolean? = null
   private var batchRenderingUpdatesInEventLoopCache: Boolean? = null
   private var destroyFabricSurfacesInReactInstanceManagerCache: Boolean? = null
-  private var enableBackgroundExecutorCache: Boolean? = null
   private var enableCleanTextInputYogaNodeCache: Boolean? = null
   private var enableGranularShadowTreeStateReconciliationCache: Boolean? = null
   private var enableMicrotasksCache: Boolean? = null
@@ -94,15 +93,6 @@ public class ReactNativeFeatureFlagsCxxAccessor : ReactNativeFeatureFlagsAccesso
     return cached
   }
 
-  override fun enableBackgroundExecutor(): Boolean {
-    var cached = enableBackgroundExecutorCache
-    if (cached == null) {
-      cached = ReactNativeFeatureFlagsCxxInterop.enableBackgroundExecutor()
-      enableBackgroundExecutorCache = cached
-    }
-    return cached
-  }
-
   override fun enableCleanTextInputYogaNode(): Boolean {
     var cached = enableCleanTextInputYogaNodeCache
     if (cached == null) {

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/internal/featureflags/ReactNativeFeatureFlagsCxxInterop.kt

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<46dae6ea607040efd2fc55f7ef3594df>>
+ * @generated SignedSource<<317e652e32f680ed7cfa4989a8133dad>>
  */
 
 /**
@@ -38,8 +38,6 @@ public object ReactNativeFeatureFlagsCxxInterop {
 
   @DoNotStrip @JvmStatic public external fun destroyFabricSurfacesInReactInstanceManager(): Boolean
 
-  @DoNotStrip @JvmStatic public external fun enableBackgroundExecutor(): Boolean
-
   @DoNotStrip @JvmStatic public external fun enableCleanTextInputYogaNode(): Boolean
 
   @DoNotStrip @JvmStatic public external fun enableGranularShadowTreeStateReconciliation(): Boolean

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/internal/featureflags/ReactNativeFeatureFlagsDefaults.kt

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<eeaa1e6cd97dd1dd4de7ee498ce6c30a>>
+ * @generated SignedSource<<9821cf51f5220e5a6e121044d024e1e6>>
  */
 
 /**
@@ -33,8 +33,6 @@ public open class ReactNativeFeatureFlagsDefaults : ReactNativeFeatureFlagsProvi
 
   override fun destroyFabricSurfacesInReactInstanceManager(): Boolean = false
 
-  override fun enableBackgroundExecutor(): Boolean = false
-
   override fun enableCleanTextInputYogaNode(): Boolean = false
 
   override fun enableGranularShadowTreeStateReconciliation(): Boolean = false

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/internal/featureflags/ReactNativeFeatureFlagsLocalAccessor.kt

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<5d4631b6ae53f2bb2cfc44bad2f05980>>
+ * @generated SignedSource<<1f61054f14a12ed03d8ee5f32221ec1f>>
  */
 
 /**
@@ -29,7 +29,6 @@ public class ReactNativeFeatureFlagsLocalAccessor : ReactNativeFeatureFlagsAcces
   private var allowRecursiveCommitsWithSynchronousMountOnAndroidCache: Boolean? = null
   private var batchRenderingUpdatesInEventLoopCache: Boolean? = null
   private var destroyFabricSurfacesInReactInstanceManagerCache: Boolean? = null
-  private var enableBackgroundExecutorCache: Boolean? = null
   private var enableCleanTextInputYogaNodeCache: Boolean? = null
   private var enableGranularShadowTreeStateReconciliationCache: Boolean? = null
   private var enableMicrotasksCache: Boolean? = null
@@ -103,16 +102,6 @@ public class ReactNativeFeatureFlagsLocalAccessor : ReactNativeFeatureFlagsAcces
     return cached
   }
 
-  override fun enableBackgroundExecutor(): Boolean {
-    var cached = enableBackgroundExecutorCache
-    if (cached == null) {
-      cached = currentProvider.enableBackgroundExecutor()
-      accessedFeatureFlags.add("enableBackgroundExecutor")
-      enableBackgroundExecutorCache = cached
-    }
-    return cached
-  }
-
   override fun enableCleanTextInputYogaNode(): Boolean {
     var cached = enableCleanTextInputYogaNodeCache
     if (cached == null) {

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/internal/featureflags/ReactNativeFeatureFlagsProvider.kt

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<53a55d7cae6f18a4192f28a6f44b0c3b>>
+ * @generated SignedSource<<a3ee4e4eae374959d5211897be02b983>>
  */
 
 /**
@@ -33,8 +33,6 @@ public interface ReactNativeFeatureFlagsProvider {
 
   @DoNotStrip public fun destroyFabricSurfacesInReactInstanceManager(): Boolean
 
-  @DoNotStrip public fun enableBackgroundExecutor(): Boolean
-
   @DoNotStrip public fun enableCleanTextInputYogaNode(): Boolean
 
   @DoNotStrip public fun enableGranularShadowTreeStateReconciliation(): Boolean

packages/react-native/ReactAndroid/src/main/jni/react/fabric/Binding.cpp

@@ -12,7 +12,6 @@
 #include "EventBeatManager.h"
 #include "EventEmitterWrapper.h"
 #include "FabricMountingManager.h"
-#include "JBackgroundExecutor.h"
 #include "ReactNativeConfigHolder.h"
 #include "SurfaceHandlerBinding.h"
 
@@ -416,11 +415,6 @@ void Binding::installFabricUIManager(
 
   toolbox.asynchronousEventBeatFactory = asynchronousBeatFactory;
 
-  if (ReactNativeFeatureFlags::enableBackgroundExecutor()) {
-    backgroundExecutor_ = JBackgroundExecutor::create("fabric_bg");
-    toolbox.backgroundExecutor = backgroundExecutor_;
-  }
-
   animationDriver_ = std::make_shared<LayoutAnimationDriver>(
       runtimeExecutor, contextContainer, this);
   scheduler_ =

packages/react-native/ReactAndroid/src/main/jni/react/featureflags/JReactNativeFeatureFlagsCxxInterop.cpp

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<9eee86e80b454c80ba6c64efe2a5fcac>>
+ * @generated SignedSource<<03c48c7281afa746734af581d6a17aa3>>
  */
 
 /**
@@ -69,12 +69,6 @@ class ReactNativeFeatureFlagsProviderHolder
     return method(javaProvider_);
   }
 
-  bool enableBackgroundExecutor() override {
-    static const auto method =
-        getReactNativeFeatureFlagsProviderJavaClass()->getMethod<jboolean()>("enableBackgroundExecutor");
-    return method(javaProvider_);
-  }
-
   bool enableCleanTextInputYogaNode() override {
     static const auto method =
         getReactNativeFeatureFlagsProviderJavaClass()->getMethod<jboolean()>("enableCleanTextInputYogaNode");
@@ -236,11 +230,6 @@ bool JReactNativeFeatureFlagsCxxInterop::destroyFabricSurfacesInReactInstanceMan
   return ReactNativeFeatureFlags::destroyFabricSurfacesInReactInstanceManager();
 }
 
-bool JReactNativeFeatureFlagsCxxInterop::enableBackgroundExecutor(
-    facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop> /*unused*/) {
-  return ReactNativeFeatureFlags::enableBackgroundExecutor();
-}
-
 bool JReactNativeFeatureFlagsCxxInterop::enableCleanTextInputYogaNode(
     facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop> /*unused*/) {
   return ReactNativeFeatureFlags::enableCleanTextInputYogaNode();
@@ -383,9 +372,6 @@ void JReactNativeFeatureFlagsCxxInterop::registerNatives() {
       makeNativeMethod(
         "destroyFabricSurfacesInReactInstanceManager",
         JReactNativeFeatureFlagsCxxInterop::destroyFabricSurfacesInReactInstanceManager),
-      makeNativeMethod(
-        "enableBackgroundExecutor",
-        JReactNativeFeatureFlagsCxxInterop::enableBackgroundExecutor),
       makeNativeMethod(
         "enableCleanTextInputYogaNode",
         JReactNativeFeatureFlagsCxxInterop::enableCleanTextInputYogaNode),

packages/react-native/ReactAndroid/src/main/jni/react/featureflags/JReactNativeFeatureFlagsCxxInterop.h

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<7702364bf684f25181e821004dba5383>>
+ * @generated SignedSource<<37f8ec65fb26fc58260a5846ab933098>>
  */
 
 /**
@@ -45,9 +45,6 @@ class JReactNativeFeatureFlagsCxxInterop
   static bool destroyFabricSurfacesInReactInstanceManager(
     facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop>);
 
-  static bool enableBackgroundExecutor(
-    facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop>);
-
   static bool enableCleanTextInputYogaNode(
     facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop>);