diff --git a/src/com/android/contacts/ContactsApplication.java b/src/com/android/contacts/ContactsApplication.java
index 1c8c080..4007916 100644
--- a/src/com/android/contacts/ContactsApplication.java
+++ b/src/com/android/contacts/ContactsApplication.java
@@ -18,6 +18,7 @@
 
 import com.android.contacts.model.AccountTypeManager;
 import com.android.contacts.test.InjectedServices;
+import com.android.contacts.util.Constants;
 import com.google.common.annotations.VisibleForTesting;
 
 import android.app.Application;
@@ -27,9 +28,9 @@
 import android.content.SharedPreferences;
 import android.os.StrictMode;
 import android.preference.PreferenceManager;
+import android.util.Log;
 
 public final class ContactsApplication extends Application {
-
     private static InjectedServices sInjectedServices;
     private AccountTypeManager mAccountTypeManager;
     private ContactPhotoManager mContactPhotoManager;
@@ -100,6 +101,10 @@
     public void onCreate() {
         super.onCreate();
 
+        if (Log.isLoggable(Constants.PERFORMANCE_TAG, Log.DEBUG)) {
+            Log.d(Constants.PERFORMANCE_TAG, "ContactsApplication.onCreate start");
+        }
+
         // Priming caches to placate the StrictMode police
         Context context = getApplicationContext();
         PreferenceManager.getDefaultSharedPreferences(context);
@@ -108,5 +113,9 @@
 
         StrictMode.setThreadPolicy(
                 new StrictMode.ThreadPolicy.Builder().detectAll().penaltyLog().build());
+
+        if (Log.isLoggable(Constants.PERFORMANCE_TAG, Log.DEBUG)) {
+            Log.d(Constants.PERFORMANCE_TAG, "ContactsApplication.onCreate finish");
+        }
     }
 }
diff --git a/src/com/android/contacts/activities/PeopleActivity.java b/src/com/android/contacts/activities/PeopleActivity.java
index b68bfc9..ebf1dbd 100644
--- a/src/com/android/contacts/activities/PeopleActivity.java
+++ b/src/com/android/contacts/activities/PeopleActivity.java
@@ -55,6 +55,7 @@
 import com.android.contacts.preference.DisplayOptionsPreferenceFragment;
 import com.android.contacts.util.AccountSelectionUtil;
 import com.android.contacts.util.AccountsListAdapter;
+import com.android.contacts.util.Constants;
 import com.android.contacts.util.DialogManager;
 import com.android.contacts.util.PhoneCapabilityTester;
 
@@ -233,6 +234,9 @@
 
     @Override
     protected void onCreate(Bundle savedState) {
+        if (Log.isLoggable(Constants.PERFORMANCE_TAG, Log.DEBUG)) {
+            Log.d(Constants.PERFORMANCE_TAG, "PeopleActivity.onCreate start");
+        }
         super.onCreate(savedState);
 
         if (!processIntent(false)) {
@@ -242,6 +246,9 @@
 
         mIsRecreatedInstance = (savedState != null);
         createViewsAndFragments(savedState);
+        if (Log.isLoggable(Constants.PERFORMANCE_TAG, Log.DEBUG)) {
+            Log.d(Constants.PERFORMANCE_TAG, "PeopleActivity.onCreate finish");
+        }
     }
 
     @Override
diff --git a/src/com/android/contacts/model/AccountTypeManager.java b/src/com/android/contacts/model/AccountTypeManager.java
index d60f355..65af3ee 100644
--- a/src/com/android/contacts/model/AccountTypeManager.java
+++ b/src/com/android/contacts/model/AccountTypeManager.java
@@ -16,6 +16,7 @@
 
 package com.android.contacts.model;
 
+import com.android.contacts.util.Constants;
 import com.android.i18n.phonenumbers.PhoneNumberUtil;
 import com.android.internal.util.Objects;
 import com.google.android.collect.Lists;
@@ -271,6 +272,9 @@
      * called on a background thread.
      */
     protected void loadAccountsInBackground() {
+        if (Log.isLoggable(Constants.PERFORMANCE_TAG, Log.DEBUG)) {
+            Log.d(Constants.PERFORMANCE_TAG, "AccountTypeManager.loadAccountsInBackground start");
+        }
         long startTime = SystemClock.currentThreadTimeMillis();
 
         // Account types, keyed off the account type and data set concatenation.
@@ -419,6 +423,9 @@
             mInitializationLatch.countDown();
             mInitializationLatch = null;
         }
+        if (Log.isLoggable(Constants.PERFORMANCE_TAG, Log.DEBUG)) {
+            Log.d(Constants.PERFORMANCE_TAG, "AccountTypeManager.loadAccountsInBackground finish");
+        }
     }
 
     // Bookkeeping method for tracking the known account types in the given maps.
diff --git a/src/com/android/contacts/util/Constants.java b/src/com/android/contacts/util/Constants.java
index a8ba059..d79f029 100644
--- a/src/com/android/contacts/util/Constants.java
+++ b/src/com/android/contacts/util/Constants.java
@@ -24,4 +24,8 @@
     public static final String SCHEME_MAILTO = "mailto";
     public static final String SCHEME_IMTO = "imto";
     public static final String SCHEME_SIP = "sip";
+
+    // Log tag for performance measurement.
+    // To enable: adb shell setprop log.tag.ContactsPerf VERBOSE
+    public static final String PERFORMANCE_TAG = "ContactsPerf";
 }