SKETCH Add performance tracking for rendering

Differential Revision: D3709400

fbshipit-source-id: a006b60feb3fc5cb55cc2e6f08275fcc8de1d3e1

ReactAndroid/src/main/java/com/facebook/react/bridge/PerformanceCounter.java

@@ -0,0 +1,15 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+package com.facebook.react.bridge;
+
+import java.util.Map;
+
+public interface PerformanceCounter {
+  public Map<String,Double> getPerformanceCounters();
+}

ReactAndroid/src/main/java/com/facebook/react/bridge/ReactContext.java

@@ -13,6 +13,8 @@ import javax.annotation.Nullable;
 
 import java.lang.ref.WeakReference;
 import java.util.concurrent.CopyOnWriteArraySet;
+import java.util.HashMap;
+import java.util.Map;
 
 import android.app.Activity;
 import android.content.Context;
@@ -143,6 +145,20 @@ public class ReactContext extends ContextWrapper {
     mLifecycleEventListeners.remove(listener);
   }
 
+  public Map<String, Map<String,Double>> getAllPerformanceCounters() {
+    Map<String, Map<String,Double>> totalPerfMap =
+      new HashMap<>();
+    if (mCatalystInstance != null) {
+      for (NativeModule nativeModule : mCatalystInstance.getNativeModules()) {
+        if (nativeModule instanceof PerformanceCounter) {
+          PerformanceCounter perfCounterModule = (PerformanceCounter) nativeModule;
+          totalPerfMap.put(nativeModule.getName(), perfCounterModule.getPerformanceCounters());
+        }
+      }
+    }
+    return totalPerfMap;
+  }
+
   public void addActivityEventListener(ActivityEventListener listener) {
     mActivityEventListeners.add(listener);
   }