facebook · ryancat · Aug 15, 2023
diff --git a/packages/react-native/Libraries/WebPerformance/NativePerformance.cpp b/packages/react-native/Libraries/WebPerformance/NativePerformance.cpp
@@ -56,17 +56,21 @@ std::unordered_map<std::string, double> NativePerformance::getSimpleMemoryInfo(
 
 ReactNativeStartupTiming NativePerformance::getReactNativeStartupTiming(
     jsi::Runtime &rt) {
-  ReactNativeStartupTiming result = {0, 0, 0, 0};
+  ReactNativeStartupTiming result = {0, 0, 0, 0, 0, 0};
 
   ReactMarker::StartupLogger &startupLogger =
       ReactMarker::StartupLogger::getInstance();
   result.startTime = startupLogger.getAppStartupStartTime();
+  if (result.startTime == 0) {
+    result.startTime = startupLogger.getInitReactRuntimeStartTime();
+  }
+  result.initializeRuntimeStart = startupLogger.getInitReactRuntimeStartTime();
   result.executeJavaScriptBundleEntryPointStart =
       startupLogger.getRunJSBundleStartTime();
   result.executeJavaScriptBundleEntryPointEnd =
       startupLogger.getRunJSBundleEndTime();
+  result.initializeRuntimeEnd = startupLogger.getInitReactRuntimeEndTime();
   result.endTime = startupLogger.getAppStartupEndTime();
-
   return result;
 }
 

diff --git a/packages/react-native/Libraries/WebPerformance/NativePerformance.h b/packages/react-native/Libraries/WebPerformance/NativePerformance.h
@@ -20,15 +20,18 @@ class PerformanceEntryReporter;
 
 using ReactNativeStartupTiming =
     NativePerformanceCxxBaseReactNativeStartupTiming<
-        int32_t, // Start time of the RN app startup process
-        int32_t, // End time of the RN app startup process
-        int32_t, // Start time that RN app execute the JS bundle
-        int32_t // End time that RN app execute the JS bundle
-        >;
+        int32_t,
+        int32_t,
+        int32_t,
+        int32_t,
+        int32_t,
+        int32_t>;
 
 template <>
 struct Bridging<ReactNativeStartupTiming>
     : NativePerformanceCxxBaseReactNativeStartupTimingBridging<
+          int32_t,
+          int32_t,
           int32_t,
           int32_t,
           int32_t,

diff --git a/packages/react-native/Libraries/WebPerformance/NativePerformance.js b/packages/react-native/Libraries/WebPerformance/NativePerformance.js
@@ -17,6 +17,8 @@ export type NativeMemoryInfo = {[key: string]: number};
 export type ReactNativeStartupTiming = {|
   startTime: number,
   endTime: number,
+  initializeRuntimeStart: number,
+  initializeRuntimeEnd: number,
   executeJavaScriptBundleEntryPointStart: number,
   executeJavaScriptBundleEntryPointEnd: number,
 |};

diff --git a/packages/react-native/Libraries/WebPerformance/ReactNativeStartupTiming.js b/packages/react-native/Libraries/WebPerformance/ReactNativeStartupTiming.js
@@ -21,13 +21,17 @@ export default class ReactNativeStartupTiming {
   // See https://www.w3.org/TR/performance-timeline/#performancetiming-interface
   _startTime = 0;
   _endTime = 0;
+  _initializeRuntimeStart = 0;
+  _initializeRuntimeEnd = 0;
   _executeJavaScriptBundleEntryPointStart = 0;
   _executeJavaScriptBundleEntryPointEnd = 0;
 
   constructor(startUpTiming: ?ReactNativeStartupTimingType) {
     if (startUpTiming != null) {
       this._startTime = startUpTiming.startTime;
       this._endTime = startUpTiming.endTime;
+      this._initializeRuntimeStart = startUpTiming.initializeRuntimeStart;
+      this._initializeRuntimeEnd = startUpTiming.initializeRuntimeEnd;
       this._executeJavaScriptBundleEntryPointStart =
         startUpTiming.executeJavaScriptBundleEntryPointStart;
       this._executeJavaScriptBundleEntryPointEnd =
@@ -36,7 +40,7 @@ export default class ReactNativeStartupTiming {
   }
 
   /**
-   *  Start time of the RN app startup process. This is provided by the platform by implementing the `ReactMarker.setAppStartTime` API in the native platform code.
+   * Start time of the RN app startup process. This is provided by the platform by implementing the `ReactMarker.setAppStartTime` API in the native platform code.
    */
   get startTime(): number {
     return this._startTime;
@@ -49,6 +53,20 @@ export default class ReactNativeStartupTiming {
     return this._endTime;
   }
 
+  /**
+   * Start time when RN runtime get initialized. This is when RN infra first kicks in app startup process.
+   */
+  get initializeRuntimeStart(): number {
+    return this._initializeRuntimeStart;
+  }
+
+  /**
+   * End time when RN runtime get initialized. This is the last marker before ends of the app startup process.
+   */
+  get initializeRuntimeEnd(): number {
+    return this._initializeRuntimeEnd;
+  }
+
   /**
    * Start time of JS bundle being executed. This indicates the RN JS bundle is loaded and start to be evaluated.
    */

diff --git a/packages/react-native/Libraries/WebPerformance/__mocks__/NativePerformance.js b/packages/react-native/Libraries/WebPerformance/__mocks__/NativePerformance.js
@@ -58,6 +58,8 @@ const NativePerformanceMock: NativePerformance = {
       endTime: 0,
       executeJavaScriptBundleEntryPointStart: 0,
       executeJavaScriptBundleEntryPointEnd: 0,
+      initializeRuntimeStart: 0,
+      initializeRuntimeEnd: 0,
     };
   },
 };

diff --git a/packages/react-native/React/Base/RCTPLTag.h b/packages/react-native/React/Base/RCTPLTag.h
@@ -26,5 +26,6 @@ typedef NS_ENUM(NSInteger, RCTPLTag) {
   RCTPLBundleSize,
   RCTPLReactInstanceInit,
   RCTPLAppStartup,
+  RCTPLInitReactRuntime,
   RCTPLSize // This is used to count the size
 };
diff --git a/packages/react-native/React/Base/RCTPerformanceLoggerLabels.m b/packages/react-native/React/Base/RCTPerformanceLoggerLabels.m
@@ -51,6 +51,8 @@
       return @"ReactInstanceInit";
     case RCTPLAppStartup:
       return @"AppStartup";
+    case RCTPLInitReactRuntime:
+      return @"InitReactRuntime";
     case RCTPLSize: // Only used to count enum size
       RCTAssert(NO, @"RCTPLSize should not be used to track performance timestamps.");
       return nil;

diff --git a/packages/react-native/React/CxxBridge/RCTCxxBridge.mm b/packages/react-native/React/CxxBridge/RCTCxxBridge.mm
@@ -126,6 +126,12 @@ static void mapReactMarkerToPerformanceLogger(
     case ReactMarker::APP_STARTUP_STOP:
       [performanceLogger markStopForTag:RCTPLAppStartup];
       break;
+    case ReactMarker::INIT_REACT_RUNTIME_START:
+      [performanceLogger markStartForTag:RCTPLInitReactRuntime];
+      break;
+    case ReactMarker::INIT_REACT_RUNTIME_STOP:
+      [performanceLogger markStopForTag:RCTPLInitReactRuntime];
+      break;
     case ReactMarker::RUN_JS_BUNDLE_START:
       [performanceLogger markStartForTag:RCTPLScriptExecution];
       break;

diff --git a/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/ReactNativeHost.java b/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/ReactNativeHost.java
@@ -38,6 +38,7 @@ protected ReactNativeHost(Application application) {
   /** Get the current {@link ReactInstanceManager} instance, or create one. */
   public ReactInstanceManager getReactInstanceManager() {
     if (mReactInstanceManager == null) {
+      ReactMarker.logMarker(ReactMarkerConstants.INIT_REACT_RUNTIME_START);
       ReactMarker.logMarker(ReactMarkerConstants.GET_REACT_INSTANCE_MANAGER_START);
       mReactInstanceManager = createReactInstanceManager();
       ReactMarker.logMarker(ReactMarkerConstants.GET_REACT_INSTANCE_MANAGER_END);

diff --git a/...act-native/ReactAndroid/src/main/java/com/facebook/react/bridge/ReactMarkerConstants.java b/...act-native/ReactAndroid/src/main/java/com/facebook/react/bridge/ReactMarkerConstants.java
@@ -13,6 +13,8 @@ public enum ReactMarkerConstants {
   APP_STARTUP_END(true),
   CREATE_REACT_CONTEXT_START,
   CREATE_REACT_CONTEXT_END(true),
+  INIT_REACT_RUNTIME_START(true),
+  INIT_REACT_RUNTIME_END(true),
   PROCESS_PACKAGES_START,
   PROCESS_PACKAGES_END,
   BUILD_NATIVE_MODULE_REGISTRY_START,

diff --git a/packages/react-native/ReactAndroid/src/main/jni/react/jni/JReactMarker.cpp b/packages/react-native/ReactAndroid/src/main/jni/react/jni/JReactMarker.cpp
@@ -72,6 +72,12 @@ void JReactMarker::logPerfMarkerWithInstanceKey(
     case ReactMarker::APP_STARTUP_STOP:
       JReactMarker::logMarker("APP_STARTUP_END");
       break;
+    case ReactMarker::INIT_REACT_RUNTIME_START:
+      JReactMarker::logMarker("INIT_REACT_RUNTIME_START");
+      break;
+    case ReactMarker::INIT_REACT_RUNTIME_STOP:
+      JReactMarker::logMarker("INIT_REACT_RUNTIME_END");
+      break;
     case ReactMarker::RUN_JS_BUNDLE_START:
       JReactMarker::logMarker("RUN_JS_BUNDLE_START", tag, instanceKey);
       break;
@@ -120,6 +126,12 @@ void JReactMarker::nativeLogMarker(
   } else if (markerNameStr == "APP_STARTUP_END") {
     ReactMarker::logMarkerDone(
         ReactMarker::APP_STARTUP_STOP, (double)markerTime);
+  } else if (markerNameStr == "INIT_REACT_RUNTIME_START") {
+    ReactMarker::logMarkerDone(
+        ReactMarker::INIT_REACT_RUNTIME_START, (double)markerTime);
+  } else if (markerNameStr == "INIT_REACT_RUNTIME_END") {
+    ReactMarker::logMarkerDone(
+        ReactMarker::INIT_REACT_RUNTIME_STOP, (double)markerTime);
   } else if (markerNameStr == "RUN_JS_BUNDLE_START") {
     ReactMarker::logMarkerDone(
         ReactMarker::RUN_JS_BUNDLE_START, (double)markerTime);

diff --git a/packages/react-native/ReactCommon/cxxreact/ReactMarker.cpp b/packages/react-native/ReactCommon/cxxreact/ReactMarker.cpp
@@ -64,6 +64,18 @@ void StartupLogger::logStartupEvent(
       }
       return;
 
+    case ReactMarkerId::INIT_REACT_RUNTIME_START:
+      if (initReactRuntimeStartTime == 0) {
+        initReactRuntimeStartTime = markerTime;
+      }
+      return;
+
+    case ReactMarkerId::INIT_REACT_RUNTIME_STOP:
+      if (initReactRuntimeEndTime == 0) {
+        initReactRuntimeEndTime = markerTime;
+      }
+      return;
+
     case ReactMarkerId::RUN_JS_BUNDLE_START:
       if (runJSBundleStartTime == 0) {
         runJSBundleStartTime = markerTime;
@@ -85,6 +97,14 @@ double StartupLogger::getAppStartupStartTime() {
   return appStartupStartTime;
 }
 
+double StartupLogger::getInitReactRuntimeStartTime() {
+  return initReactRuntimeStartTime;
+}
+
+double StartupLogger::getInitReactRuntimeEndTime() {
+  return initReactRuntimeEndTime;
+}
+
 double StartupLogger::getRunJSBundleStartTime() {
   return runJSBundleStartTime;
 }

diff --git a/packages/react-native/ReactCommon/cxxreact/ReactMarker.h b/packages/react-native/ReactCommon/cxxreact/ReactMarker.h
@@ -17,6 +17,8 @@ namespace ReactMarker {
 enum ReactMarkerId {
   APP_STARTUP_START,
   APP_STARTUP_STOP,
+  INIT_REACT_RUNTIME_START,
+  INIT_REACT_RUNTIME_STOP,
   NATIVE_REQUIRE_START,
   NATIVE_REQUIRE_STOP,
   RUN_JS_BUNDLE_START,
@@ -71,6 +73,8 @@ class RN_EXPORT StartupLogger {
 
   void logStartupEvent(const ReactMarkerId markerName, double markerTime);
   double getAppStartupStartTime();
+  double getInitReactRuntimeStartTime();
+  double getInitReactRuntimeEndTime();
   double getRunJSBundleStartTime();
   double getRunJSBundleEndTime();
   double getAppStartupEndTime();
@@ -82,6 +86,8 @@ class RN_EXPORT StartupLogger {
 
   double appStartupStartTime;
   double appStartupEndTime;
+  double initReactRuntimeStartTime;
+  double initReactRuntimeEndTime;
   double runJSBundleStartTime;
   double runJSBundleEndTime;
 };

diff --git a/packages/react-native/ReactCommon/jsiexecutor/jsireact/JSIExecutor.cpp b/packages/react-native/ReactCommon/jsiexecutor/jsireact/JSIExecutor.cpp
@@ -163,6 +163,8 @@ void JSIExecutor::loadBundle(
   if (hasLogger) {
     ReactMarker::logTaggedMarker(
         ReactMarker::RUN_JS_BUNDLE_STOP, scriptName.c_str());
+    ReactMarker::logMarker(ReactMarker::INIT_REACT_RUNTIME_STOP);
+    ReactMarker::logMarker(ReactMarker::APP_STARTUP_STOP);
   }
 }
 

diff --git a/packages/react-native/ReactCommon/react/bridgeless/ReactInstance.cpp b/packages/react-native/ReactCommon/react/bridgeless/ReactInstance.cpp
@@ -220,6 +220,9 @@ void ReactInstance::loadScript(
           if (hasLogger) {
             ReactMarker::logTaggedMarkerBridgeless(
                 ReactMarker::RUN_JS_BUNDLE_STOP, scriptName.c_str());
+            ReactMarker::logMarkerBridgeless(
+                ReactMarker::INIT_REACT_RUNTIME_STOP);
+            ReactMarker::logMarkerBridgeless(ReactMarker::APP_STARTUP_STOP);
           }
           if (auto strongBufferedRuntimeExecuter =
                   weakBufferedRuntimeExecuter.lock()) {

diff --git a/...native/ReactCommon/react/bridgeless/platform/ios/ReactCommon/RCTPerformanceLoggerUtils.mm b/...native/ReactCommon/react/bridgeless/platform/ios/ReactCommon/RCTPerformanceLoggerUtils.mm
@@ -23,6 +23,12 @@ static void mapReactMarkerToPerformanceLogger(
     case ReactMarker::APP_STARTUP_STOP:
       [performanceLogger markStopForTag:RCTPLAppStartup];
       break;
+    case ReactMarker::INIT_REACT_RUNTIME_START:
+      [performanceLogger markStartForTag:RCTPLInitReactRuntime];
+      break;
+    case ReactMarker::INIT_REACT_RUNTIME_STOP:
+      [performanceLogger markStopForTag:RCTPLInitReactRuntime];
+      break;
     case ReactMarker::RUN_JS_BUNDLE_START:
       [performanceLogger markStartForTag:RCTPLScriptExecution];
       break;

diff --git a/packages/rn-tester/js/examples/Performance/PerformanceApiExample.js b/packages/rn-tester/js/examples/Performance/PerformanceApiExample.js
@@ -73,6 +73,9 @@ function StartupTimingExample(): React.Node {
           <Text>{`startTime: ${
             startUpTiming == null ? 'N/A' : startUpTiming.startTime
           } ms`}</Text>
+          <Text>{`initializeRuntimeStart: ${
+            startUpTiming == null ? 'N/A' : startUpTiming.initializeRuntimeStart
+          } ms`}</Text>
           <Text>
             {`executeJavaScriptBundleEntryPointStart: ${
               startUpTiming == null
@@ -85,6 +88,9 @@ function StartupTimingExample(): React.Node {
               ? 'N/A'
               : startUpTiming.executeJavaScriptBundleEntryPointEnd
           } ms`}</Text>
+          <Text>{`initializeRuntimeEnd: ${
+            startUpTiming == null ? 'N/A' : startUpTiming.initializeRuntimeEnd
+          } ms`}</Text>
           <Text>{`endTime: ${
             startUpTiming == null ? 'N/A' : startUpTiming.endTime
           } ms`}</Text>