Add performance track for React Native renderer

Summary:
Changelog: [General][Added] Add new custom track for React Native Renderer operations in React Native DevTools performance traces

This diff adds performance tracking instrumentation to the React Native renderer to provide visibility into rendering operations in React Native Developer Tools traces.

On Android (Kotlin), the MountItemDispatcher is updated to wrap key mounting operations (view commands, premount, and mount) with PerformanceTracer.trace calls. These traces appear on the "Renderer" track within the "⚛ Native" track group.

On C++ (shared renderer), the ShadowTree::tryCommit method is instrumented with PerformanceTracerSection to track commit and layout operations. The commit trace includes metadata about the source of the commit (e.g., React).

Reviewed By: NickGerleman

Differential Revision: D97766334

fbshipit-source-id: 71ced2b6e43b6f07509ba5eebcc79cf745778000

Author: rubennorte

packages/react-native/Package.swift

@@ -463,7 +463,7 @@ let reactFabric = RNTarget(
     "components/virtualview",
     "components/root/tests",
   ],
-  dependencies: [.reactNativeDependencies, .reactJsiExecutor, .rctTypesafety, .reactTurboModuleCore, .jsi, .logger, .reactDebug, .reactFeatureFlags, .reactUtils, .reactRuntimeScheduler, .reactCxxReact, .reactRendererDebug, .reactGraphics, .yoga],
+  dependencies: [.reactNativeDependencies, .reactJsiExecutor, .rctTypesafety, .reactTurboModuleCore, .jsi, .logger, .reactDebug, .reactFeatureFlags, .reactUtils, .reactRuntimeScheduler, .reactCxxReact, .reactRendererDebug, .reactGraphics, .yoga, .reactJsInspectorTracing],
   sources: ["animated", "animationbackend", "animations", "attributedstring", "core", "componentregistry", "componentregistry/native", "components/root", "components/view", "components/view/platform/cxx", "components/scrollview", "components/scrollview/platform/cxx", "components/scrollview/platform/ios", "components/legacyviewmanagerinterop", "components/legacyviewmanagerinterop/platform/ios", "dom", "scheduler", "mounting", "observers/events", "observers/intersection", "observers/mutation", "telemetry", "consistency", "leakchecker", "uimanager", "uimanager/consistency", "viewtransition"]
 )
 

packages/react-native/ReactAndroid/api/ReactAndroid.api

@@ -3114,6 +3114,7 @@ public final class com/facebook/react/soloader/OpenSourceMergedSoMapping : com/f
 	public final fun libreact_devsupportjni_so ()I
 	public final fun libreact_featureflagsjni_so ()I
 	public final fun libreact_newarchdefaults_so ()I
+	public final fun libreact_tracingjni_so ()I
 	public final fun libreactnative_so ()I
 	public final fun libreactnativeblob_so ()I
 	public final fun libreactnativejni_common_so ()I

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/fabric/mounting/MountItemDispatcher.kt

@@ -21,6 +21,7 @@ import com.facebook.react.fabric.FabricUIManager
 import com.facebook.react.fabric.mounting.mountitems.DispatchCommandMountItem
 import com.facebook.react.fabric.mounting.mountitems.MountItem
 import com.facebook.react.internal.featureflags.ReactNativeFeatureFlags
+import com.facebook.react.internal.tracing.PerformanceTracer
 import com.facebook.systrace.Systrace
 import java.util.Queue
 import java.util.concurrent.ConcurrentLinkedQueue
@@ -201,9 +202,16 @@ internal class MountItemDispatcher(
           "MountItemDispatcher::mountViews viewCommandMountItems",
       )
 
-      for (command in commands) {
-        dispatchViewCommand(command)
-      }
+      PerformanceTracer.trace(
+          "view commands",
+          "Renderer",
+          "\u269b Native",
+          { ->
+            for (command in commands) {
+              dispatchViewCommand(command)
+            }
+          },
+      )
 
       Systrace.endSection(Systrace.TRACE_TAG_REACT)
     }
@@ -215,12 +223,21 @@ internal class MountItemDispatcher(
           Systrace.TRACE_TAG_REACT,
           "MountItemDispatcher::mountViews preMountItems",
       )
-      for (preMountItem in preMountItems) {
-        if (ReactNativeFeatureFlags.enableFabricLogs()) {
-          printMountItem(preMountItem, "dispatchMountItems: Executing preMountItem")
-        }
-        executeOrEnqueue(preMountItem)
-      }
+
+      PerformanceTracer.trace(
+          "premount",
+          "Renderer",
+          "\u269b Native",
+          { ->
+            for (preMountItem in preMountItems) {
+              if (ReactNativeFeatureFlags.enableFabricLogs()) {
+                printMountItem(preMountItem, "dispatchMountItems: Executing preMountItem")
+              }
+              executeOrEnqueue(preMountItem)
+            }
+          },
+      )
+
       Systrace.endSection(Systrace.TRACE_TAG_REACT)
     }
 
@@ -229,46 +246,58 @@ internal class MountItemDispatcher(
           Systrace.TRACE_TAG_REACT,
           "MountItemDispatcher::mountViews mountItems to execute",
       )
-      val batchedExecutionStartTime = SystemClock.uptimeMillis()
 
-      for (mountItem in items) {
-        if (ReactNativeFeatureFlags.enableFabricLogs()) {
-          printMountItem(mountItem, "dispatchMountItems: Executing mountItem")
-        }
+      PerformanceTracer.trace(
+          "mount",
+          "Renderer",
+          "\u269b Native",
+          { ->
+            val batchedExecutionStartTime = SystemClock.uptimeMillis()
 
-        val command = mountItem as? DispatchCommandMountItem
-        if (command != null) {
-          dispatchViewCommand(command)
-          continue
-        }
+            for (mountItem in items) {
+              if (ReactNativeFeatureFlags.enableFabricLogs()) {
+                printMountItem(mountItem, "dispatchMountItems: Executing mountItem")
+              }
 
-        try {
-          executeOrEnqueue(mountItem)
-        } catch (e: Throwable) {
-          // If there's an exception, we want to log diagnostics in prod and rethrow.
-          FLog.e(TAG, "dispatchMountItems: caught exception, displaying mount state", e)
-          if (ReactNativeFeatureFlags.enableFabricLogs()) {
-            for (m in items) {
-              if (m === mountItem) {
-                // We want to mark the mount item that caused exception
-                FLog.e(TAG, "dispatchMountItems: mountItem: next mountItem triggered exception!")
+              val command = mountItem as? DispatchCommandMountItem
+              if (command != null) {
+                dispatchViewCommand(command)
+                continue
               }
-              printMountItem(m, "dispatchMountItems: mountItem")
-            }
-          }
 
-          if (mountItem.getSurfaceId() != View.NO_ID) {
-            mountingManager.getSurfaceManager(mountItem.getSurfaceId())?.printSurfaceState()
-          }
+              try {
+                executeOrEnqueue(mountItem)
+              } catch (e: Throwable) {
+                // If there's an exception, we want to log diagnostics in prod and rethrow.
+                FLog.e(TAG, "dispatchMountItems: caught exception, displaying mount state", e)
+                if (ReactNativeFeatureFlags.enableFabricLogs()) {
+                  for (m in items) {
+                    if (m === mountItem) {
+                      // We want to mark the mount item that caused exception
+                      FLog.e(
+                          TAG,
+                          "dispatchMountItems: mountItem: next mountItem triggered exception!",
+                      )
+                    }
+                    printMountItem(m, "dispatchMountItems: mountItem")
+                  }
+                }
+
+                if (mountItem.getSurfaceId() != View.NO_ID) {
+                  mountingManager.getSurfaceManager(mountItem.getSurfaceId())?.printSurfaceState()
+                }
+
+                if (ReactIgnorableMountingException.isIgnorable(e)) {
+                  ReactSoftExceptionLogger.logSoftException(TAG, e)
+                } else {
+                  throw e
+                }
+              }
+            }
+            batchedExecutionTime += SystemClock.uptimeMillis() - batchedExecutionStartTime
+          },
+      )
 
-          if (ReactIgnorableMountingException.isIgnorable(e)) {
-            ReactSoftExceptionLogger.logSoftException(TAG, e)
-          } else {
-            throw e
-          }
-        }
-      }
-      batchedExecutionTime += SystemClock.uptimeMillis() - batchedExecutionStartTime
       Systrace.endSection(Systrace.TRACE_TAG_REACT)
     }
 
@@ -299,26 +328,34 @@ internal class MountItemDispatcher(
   private fun dispatchPreMountItemsImpl(deadline: Long) {
     Systrace.beginSection(Systrace.TRACE_TAG_REACT, "MountItemDispatcher::premountViews")
 
-    // dispatchPreMountItems cannot be reentrant, but we want to prevent dispatchMountItems from
-    // reentering during dispatchPreMountItems
-    inDispatch = true
-
-    try {
-      while (true) {
-        if (System.nanoTime() > deadline) {
-          break
-        }
+    PerformanceTracer.trace(
+        "premount",
+        "Renderer",
+        "\u269b Native",
+        { ->
+          // dispatchPreMountItems cannot be reentrant, but we want to prevent dispatchMountItems
+          // from
+          // reentering during dispatchPreMountItems
+          inDispatch = true
+
+          try {
+            while (true) {
+              if (System.nanoTime() > deadline) {
+                break
+              }
 
-        // If list is empty, `poll` will return null, or var will never be set
-        val preMountItemToDispatch = preMountItems.poll() ?: break
-        if (ReactNativeFeatureFlags.enableFabricLogs()) {
-          printMountItem(preMountItemToDispatch, "dispatchPreMountItems")
-        }
-        executeOrEnqueue(preMountItemToDispatch)
-      }
-    } finally {
-      inDispatch = false
-    }
+              // If list is empty, `poll` will return null, or var will never be set
+              val preMountItemToDispatch = preMountItems.poll() ?: break
+              if (ReactNativeFeatureFlags.enableFabricLogs()) {
+                printMountItem(preMountItemToDispatch, "dispatchPreMountItems")
+              }
+              executeOrEnqueue(preMountItemToDispatch)
+            }
+          } finally {
+            inDispatch = false
+          }
+        },
+    )
 
     Systrace.endSection(Systrace.TRACE_TAG_REACT)
   }

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/internal/tracing/PerformanceTracer.kt

@@ -20,7 +20,7 @@ import com.facebook.soloader.SoLoader
 @DoNotStrip
 public object PerformanceTracer {
   init {
-    SoLoader.loadLibrary("react_performancetracerjni")
+    SoLoader.loadLibrary("react_tracingjni")
   }
 
   public fun <T> trace(name: String, block: () -> T): T {

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/soloader/OpenSourceMergedSoMapping.kt

@@ -28,6 +28,7 @@ public object OpenSourceMergedSoMapping : ExternalSoMapping {
         "react_devsupportjni",
         "react_featureflagsjni",
         "react_newarchdefaults",
+        "react_tracingjni",
         "reactnativeblob",
         "reactnativejni",
         "reactnativejni_common",
@@ -57,6 +58,7 @@ public object OpenSourceMergedSoMapping : ExternalSoMapping {
       "react_devsupportjni" -> libreact_devsupportjni_so()
       "react_featureflagsjni" -> libreact_featureflagsjni_so()
       "react_newarchdefaults" -> libreact_newarchdefaults_so()
+      "react_tracingjni" -> libreact_tracingjni_so()
       "reactnative" -> libreactnative_so()
       "reactnativeblob" -> libreactnativeblob_so()
       "reactnativejni" -> libreactnativejni_so()
@@ -88,6 +90,8 @@ public object OpenSourceMergedSoMapping : ExternalSoMapping {
 
   public external fun libreact_newarchdefaults_so(): Int
 
+  public external fun libreact_tracingjni_so(): Int
+
   public external fun libreactnative_so(): Int
 
   public external fun libreactnativeblob_so(): Int

packages/react-native/ReactAndroid/src/main/jni/CMakeLists.txt

@@ -159,6 +159,7 @@ add_react_android_subdir(src/main/jni/react/hermes/instrumentation/)
 add_react_android_subdir(src/main/jni/react/runtime/cxxreactpackage)
 add_react_android_subdir(src/main/jni/react/runtime/jni)
 add_react_android_subdir(src/main/jni/react/runtime/hermes/jni)
+add_react_android_subdir(src/main/jni/react/tracing)
 add_react_android_subdir(src/main/jni/react/devsupport)
 
 # SoMerging Utils
@@ -231,6 +232,7 @@ add_library(reactnative
           $<TARGET_OBJECTS:react_renderer_uimanager>
           $<TARGET_OBJECTS:react_renderer_uimanager_consistency>
           $<TARGET_OBJECTS:react_renderer_viewtransition>
+          $<TARGET_OBJECTS:react_tracingjni>
           $<TARGET_OBJECTS:react_utils>
           $<TARGET_OBJECTS:reactnativeblob>
           $<TARGET_OBJECTS:reactnativejni>
@@ -331,6 +333,7 @@ target_include_directories(reactnative
         $<TARGET_PROPERTY:react_renderer_uimanager,INTERFACE_INCLUDE_DIRECTORIES>
         $<TARGET_PROPERTY:react_renderer_uimanager_consistency,INTERFACE_INCLUDE_DIRECTORIES>
         $<TARGET_PROPERTY:react_renderer_viewtransition,INTERFACE_INCLUDE_DIRECTORIES>
+        $<TARGET_PROPERTY:react_tracingjni,INTERFACE_INCLUDE_DIRECTORIES>
         $<TARGET_PROPERTY:react_utils,INTERFACE_INCLUDE_DIRECTORIES>
         $<TARGET_PROPERTY:reactnativeblob,INTERFACE_INCLUDE_DIRECTORIES>
         $<TARGET_PROPERTY:reactnativejni,INTERFACE_INCLUDE_DIRECTORIES>

packages/react-native/ReactAndroid/src/main/jni/react/tracing/CMakeLists.txt

@@ -0,0 +1,28 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+#
+# This source code is licensed under the MIT license found in the
+# LICENSE file in the root directory of this source tree.
+
+cmake_minimum_required(VERSION 3.13)
+set(CMAKE_VERBOSE_MAKEFILE on)
+
+include(${REACT_ANDROID_DIR}/src/main/jni/first-party/jni-lib-merge/SoMerging-utils.cmake)
+include(${REACT_COMMON_DIR}/cmake-utils/react-native-flags.cmake)
+
+file(GLOB react_tracingjni_SRC CONFIGURE_DEPENDS *.cpp)
+
+add_library(react_tracingjni OBJECT ${react_tracingjni_SRC})
+
+target_merge_so(react_tracingjni)
+
+target_include_directories(react_tracingjni PUBLIC .)
+
+target_link_libraries(react_tracingjni
+        fbjni
+        folly_runtime
+        jsinspector
+        jsinspector_tracing
+        react_timing
+        reactnativejni)
+
+target_compile_reactnative_options(react_tracingjni PRIVATE)

packages/react-native/ReactCommon/React-Fabric.podspec

@@ -174,6 +174,7 @@ Pod::Spec.new do |s|
   end
 
   s.subspec "mounting" do |ss|
+    ss.dependency             "React-jsinspectortracing"
     ss.source_files         = podspec_sources("react/renderer/mounting/**/*.{m,mm,cpp,h}", "react/renderer/mounting/**/*.h")
     ss.exclude_files        = "react/renderer/mounting/tests"
     ss.header_dir           = "react/renderer/mounting"

packages/react-native/ReactCommon/react/renderer/mounting/CMakeLists.txt

@@ -22,6 +22,7 @@ target_link_libraries(react_renderer_mounting
         glog
         glog_init
         jsi
+        jsinspector_tracing
         react_debug
         react_renderer_core
         react_renderer_debug

packages/react-native/ReactCommon/react/renderer/mounting/ShadowTree.cpp

@@ -8,6 +8,7 @@
 #include "ShadowTree.h"
 
 #include <cxxreact/TraceSection.h>
+#include <jsinspector-modern/tracing/PerformanceTracerSection.h>
 #include <react/debug/react_native_assert.h>
 #include <react/renderer/components/root/RootComponentDescriptor.h>
 #include <react/renderer/components/view/ViewShadowNode.h>
@@ -24,6 +25,19 @@ namespace facebook::react {
 
 namespace {
 const int MAX_COMMIT_ATTEMPTS_BEFORE_LOCKING = 3;
+
+std::string getShadowTreeCommitSourceName(ShadowTreeCommitSource source) {
+  switch (source) {
+    case ShadowTreeCommitSource::Unknown:
+      return "Unknown";
+    case ShadowTreeCommitSource::React:
+      return "React";
+    case ShadowTreeCommitSource::AnimationEndSync:
+      return "AnimationEndSync";
+    case ShadowTreeCommitSource::ReactRevisionMerge:
+      return "ReactRevisionMerge";
+  }
+}
 } // namespace
 
 using CommitStatus = ShadowTree::CommitStatus;
@@ -316,6 +330,13 @@ CommitStatus ShadowTree::tryCommit(
     const ShadowTreeCommitTransaction& transaction,
     const CommitOptions& commitOptions) const {
   TraceSection s("ShadowTree::commit");
+  jsinspector_modern::tracing::PerformanceTracerSection s1(
+      "commit",
+      "Renderer",
+      "\u269b Native",
+      nullptr,
+      "source",
+      getShadowTreeCommitSourceName(commitOptions.source));
 
   auto isReactBranch = ReactNativeFeatureFlags::enableFabricCommitBranching() &&
       commitOptions.source == CommitSource::React;
@@ -382,7 +403,11 @@ CommitStatus ShadowTree::tryCommit(
 
   telemetry.willLayout();
   telemetry.setAsThreadLocal();
-  newRootShadowNode->layoutIfNeeded(&affectedLayoutableNodes);
+  {
+    jsinspector_modern::tracing::PerformanceTracerSection s2(
+        "layout", "Renderer", "\u269b Native");
+    newRootShadowNode->layoutIfNeeded(&affectedLayoutableNodes);
+  }
   telemetry.unsetAsThreadLocal();
   telemetry.didLayout(static_cast<int>(affectedLayoutableNodes.size()));