Add feature flag to enable running JS GC on memory pressure with Bridgeless

packages/react-native/Libraries/__tests__/__snapshots__/public-api-test.js.snap

@@ -9887,6 +9887,7 @@ export type ReactNativeFeatureFlags = $ReadOnly<{
   enableGranularShadowTreeStateReconciliation: Getter<boolean>,
   enableIOSViewClipToPaddingBox: Getter<boolean>,
   enableImagePrefetchingAndroid: Getter<boolean>,
+  enableJSRuntimeGCOnMemoryPressureOnIOS: Getter<boolean>,
   enableLayoutAnimationsOnAndroid: Getter<boolean>,
   enableLayoutAnimationsOnIOS: Getter<boolean>,
   enableLongTaskAPI: Getter<boolean>,
@@ -9952,6 +9953,7 @@ declare export const enableFixForViewCommandRace: Getter<boolean>;
 declare export const enableGranularShadowTreeStateReconciliation: Getter<boolean>;
 declare export const enableIOSViewClipToPaddingBox: Getter<boolean>;
 declare export const enableImagePrefetchingAndroid: Getter<boolean>;
+declare export const enableJSRuntimeGCOnMemoryPressureOnIOS: Getter<boolean>;
 declare export const enableLayoutAnimationsOnAndroid: Getter<boolean>;
 declare export const enableLayoutAnimationsOnIOS: Getter<boolean>;
 declare export const enableLongTaskAPI: Getter<boolean>;
@@ -10028,6 +10030,7 @@ exports[`public API should not change unintentionally src/private/featureflags/s
   +enableGranularShadowTreeStateReconciliation?: () => boolean;
   +enableIOSViewClipToPaddingBox?: () => boolean;
   +enableImagePrefetchingAndroid?: () => boolean;
+  +enableJSRuntimeGCOnMemoryPressureOnIOS?: () => boolean;
   +enableLayoutAnimationsOnAndroid?: () => boolean;
   +enableLayoutAnimationsOnIOS?: () => boolean;
   +enableLongTaskAPI?: () => boolean;

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<<2c321a7a8e811dc238a75f76180843b9>>
+ * @generated SignedSource<<9b4dfbbcc5296014d76446c3a562b260>>
  */
 
 /**
@@ -124,6 +124,12 @@ public object ReactNativeFeatureFlags {
   @JvmStatic
   public fun enableImagePrefetchingAndroid(): Boolean = accessor.enableImagePrefetchingAndroid()
 
+  /**
+   * Trigger JS runtime GC on memory pressure event on iOS
+   */
+  @JvmStatic
+  public fun enableJSRuntimeGCOnMemoryPressureOnIOS(): Boolean = accessor.enableJSRuntimeGCOnMemoryPressureOnIOS()
+
   /**
    * When enabled, LayoutAnimations API will animate state changes on Android.
    */

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<<e724939eaa9fa53c9b25c8a5a1e3196d>>
+ * @generated SignedSource<<307d64b948ab7cbba4216720c517c6ec>>
  */
 
 /**
@@ -36,6 +36,7 @@ public class ReactNativeFeatureFlagsCxxAccessor : ReactNativeFeatureFlagsAccesso
   private var enableGranularShadowTreeStateReconciliationCache: Boolean? = null
   private var enableIOSViewClipToPaddingBoxCache: Boolean? = null
   private var enableImagePrefetchingAndroidCache: Boolean? = null
+  private var enableJSRuntimeGCOnMemoryPressureOnIOSCache: Boolean? = null
   private var enableLayoutAnimationsOnAndroidCache: Boolean? = null
   private var enableLayoutAnimationsOnIOSCache: Boolean? = null
   private var enableLongTaskAPICache: Boolean? = null
@@ -211,6 +212,15 @@ public class ReactNativeFeatureFlagsCxxAccessor : ReactNativeFeatureFlagsAccesso
     return cached
   }
 
+  override fun enableJSRuntimeGCOnMemoryPressureOnIOS(): Boolean {
+    var cached = enableJSRuntimeGCOnMemoryPressureOnIOSCache
+    if (cached == null) {
+      cached = ReactNativeFeatureFlagsCxxInterop.enableJSRuntimeGCOnMemoryPressureOnIOS()
+      enableJSRuntimeGCOnMemoryPressureOnIOSCache = cached
+    }
+    return cached
+  }
+
   override fun enableLayoutAnimationsOnAndroid(): Boolean {
     var cached = enableLayoutAnimationsOnAndroidCache
     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<<a7f3ca986725fa85a6926c9e7966669b>>
+ * @generated SignedSource<<e9237a045ae4dac8109772f558059534>>
  */
 
 /**
@@ -60,6 +60,8 @@ public object ReactNativeFeatureFlagsCxxInterop {
 
   @DoNotStrip @JvmStatic public external fun enableImagePrefetchingAndroid(): Boolean
 
+  @DoNotStrip @JvmStatic public external fun enableJSRuntimeGCOnMemoryPressureOnIOS(): Boolean
+
   @DoNotStrip @JvmStatic public external fun enableLayoutAnimationsOnAndroid(): Boolean
 
   @DoNotStrip @JvmStatic public external fun enableLayoutAnimationsOnIOS(): 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<<85d40be44d053b58a74ad76467c8e5e9>>
+ * @generated SignedSource<<bc8a67b9d153fc353054f38f32267a89>>
  */
 
 /**
@@ -55,6 +55,8 @@ public open class ReactNativeFeatureFlagsDefaults : ReactNativeFeatureFlagsProvi
 
   override fun enableImagePrefetchingAndroid(): Boolean = false
 
+  override fun enableJSRuntimeGCOnMemoryPressureOnIOS(): Boolean = false
+
   override fun enableLayoutAnimationsOnAndroid(): Boolean = false
 
   override fun enableLayoutAnimationsOnIOS(): Boolean = true

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<<18d5c2ffa66a36e364bc358a144534ec>>
+ * @generated SignedSource<<eef5b0c5d02927b3984a2dd8d0c48f1c>>
  */
 
 /**
@@ -40,6 +40,7 @@ public class ReactNativeFeatureFlagsLocalAccessor : ReactNativeFeatureFlagsAcces
   private var enableGranularShadowTreeStateReconciliationCache: Boolean? = null
   private var enableIOSViewClipToPaddingBoxCache: Boolean? = null
   private var enableImagePrefetchingAndroidCache: Boolean? = null
+  private var enableJSRuntimeGCOnMemoryPressureOnIOSCache: Boolean? = null
   private var enableLayoutAnimationsOnAndroidCache: Boolean? = null
   private var enableLayoutAnimationsOnIOSCache: Boolean? = null
   private var enableLongTaskAPICache: Boolean? = null
@@ -231,6 +232,16 @@ public class ReactNativeFeatureFlagsLocalAccessor : ReactNativeFeatureFlagsAcces
     return cached
   }
 
+  override fun enableJSRuntimeGCOnMemoryPressureOnIOS(): Boolean {
+    var cached = enableJSRuntimeGCOnMemoryPressureOnIOSCache
+    if (cached == null) {
+      cached = currentProvider.enableJSRuntimeGCOnMemoryPressureOnIOS()
+      accessedFeatureFlags.add("enableJSRuntimeGCOnMemoryPressureOnIOS")
+      enableJSRuntimeGCOnMemoryPressureOnIOSCache = cached
+    }
+    return cached
+  }
+
   override fun enableLayoutAnimationsOnAndroid(): Boolean {
     var cached = enableLayoutAnimationsOnAndroidCache
     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<<4f90c47ea6f23c2ebfae1f35790c4af5>>
+ * @generated SignedSource<<d1ddd8a765735a17f9967001669a50ec>>
  */
 
 /**
@@ -55,6 +55,8 @@ public interface ReactNativeFeatureFlagsProvider {
 
   @DoNotStrip public fun enableImagePrefetchingAndroid(): Boolean
 
+  @DoNotStrip public fun enableJSRuntimeGCOnMemoryPressureOnIOS(): Boolean
+
   @DoNotStrip public fun enableLayoutAnimationsOnAndroid(): Boolean
 
   @DoNotStrip public fun enableLayoutAnimationsOnIOS(): Boolean

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<<63ebe186ccd5ee30fc654aa8d90f27f9>>
+ * @generated SignedSource<<1359f52ece07f77a4a61083a94f10fe0>>
  */
 
 /**
@@ -135,6 +135,12 @@ class ReactNativeFeatureFlagsProviderHolder
     return method(javaProvider_);
   }
 
+  bool enableJSRuntimeGCOnMemoryPressureOnIOS() override {
+    static const auto method =
+        getReactNativeFeatureFlagsProviderJavaClass()->getMethod<jboolean()>("enableJSRuntimeGCOnMemoryPressureOnIOS");
+    return method(javaProvider_);
+  }
+
   bool enableLayoutAnimationsOnAndroid() override {
     static const auto method =
         getReactNativeFeatureFlagsProviderJavaClass()->getMethod<jboolean()>("enableLayoutAnimationsOnAndroid");
@@ -399,6 +405,11 @@ bool JReactNativeFeatureFlagsCxxInterop::enableImagePrefetchingAndroid(
   return ReactNativeFeatureFlags::enableImagePrefetchingAndroid();
 }
 
+bool JReactNativeFeatureFlagsCxxInterop::enableJSRuntimeGCOnMemoryPressureOnIOS(
+    facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop> /*unused*/) {
+  return ReactNativeFeatureFlags::enableJSRuntimeGCOnMemoryPressureOnIOS();
+}
+
 bool JReactNativeFeatureFlagsCxxInterop::enableLayoutAnimationsOnAndroid(
     facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop> /*unused*/) {
   return ReactNativeFeatureFlags::enableLayoutAnimationsOnAndroid();
@@ -628,6 +639,9 @@ void JReactNativeFeatureFlagsCxxInterop::registerNatives() {
       makeNativeMethod(
         "enableImagePrefetchingAndroid",
         JReactNativeFeatureFlagsCxxInterop::enableImagePrefetchingAndroid),
+      makeNativeMethod(
+        "enableJSRuntimeGCOnMemoryPressureOnIOS",
+        JReactNativeFeatureFlagsCxxInterop::enableJSRuntimeGCOnMemoryPressureOnIOS),
       makeNativeMethod(
         "enableLayoutAnimationsOnAndroid",
         JReactNativeFeatureFlagsCxxInterop::enableLayoutAnimationsOnAndroid),

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<<fdb23cf034dea348c661f59718f07291>>
+ * @generated SignedSource<<13d552908696bd42ac2900499bc6074d>>
  */
 
 /**
@@ -78,6 +78,9 @@ class JReactNativeFeatureFlagsCxxInterop
   static bool enableImagePrefetchingAndroid(
     facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop>);
 
+  static bool enableJSRuntimeGCOnMemoryPressureOnIOS(
+    facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop>);
+
   static bool enableLayoutAnimationsOnAndroid(
     facebook::jni::alias_ref<JReactNativeFeatureFlagsCxxInterop>);
 

packages/react-native/ReactCommon/react/featureflags/ReactNativeFeatureFlags.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<<58c69846193598ce0c3666c37b8a185f>>
+ * @generated SignedSource<<b815f41d024d315ba0b6efcec89b31e1>>
  */
 
 /**
@@ -90,6 +90,10 @@ bool ReactNativeFeatureFlags::enableImagePrefetchingAndroid() {
   return getAccessor().enableImagePrefetchingAndroid();
 }
 
+bool ReactNativeFeatureFlags::enableJSRuntimeGCOnMemoryPressureOnIOS() {
+  return getAccessor().enableJSRuntimeGCOnMemoryPressureOnIOS();
+}
+
 bool ReactNativeFeatureFlags::enableLayoutAnimationsOnAndroid() {
   return getAccessor().enableLayoutAnimationsOnAndroid();
 }

packages/react-native/ReactCommon/react/featureflags/ReactNativeFeatureFlags.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<<1d578508c3cd69bbf9616a811508a03e>>
+ * @generated SignedSource<<da35bc7466accd84e6f0ce56f166c845>>
  */
 
 /**
@@ -119,6 +119,11 @@ class ReactNativeFeatureFlags {
    */
   RN_EXPORT static bool enableImagePrefetchingAndroid();
 
+  /**
+   * Trigger JS runtime GC on memory pressure event on iOS
+   */
+  RN_EXPORT static bool enableJSRuntimeGCOnMemoryPressureOnIOS();
+
   /**
    * When enabled, LayoutAnimations API will animate state changes on Android.
    */