Fix component startup time.

Firebase/Auth/Source/Auth/FIRAuth.m

@@ -1884,19 +1884,12 @@ - (BOOL)getUser:(FIRUser *_Nullable *)outUser
     return [[FIRAuth alloc] initWithApp:container.app];
   };
   FIRComponent *authInterop = [FIRComponent componentWithProtocol:@protocol(FIRAuthInterop)
+                                              instantiationTiming:FIRInstantiationTimingAlwaysEager
+                                                     dependencies:@[]
                                                     creationBlock:authCreationBlock];
   return @[authInterop];
 }
 
-#pragma mark - FIRCoreConfigurable
-
-+ (void)configureWithApp:(nonnull FIRApp *)app {
-  // TODO: Evaluate what actually needs to be configured here instead of initializing a full
-  // instance.
-  // Ensures the @c FIRAuth instance for a given app gets loaded as soon as the app is ready.
-  [FIRAuth authWithApp:app];
-}
-
 #pragma mark - FIRComponentLifecycleMaintainer
 
 - (void)appWillBeDeleted:(nonnull FIRApp *)app {

Firebase/DynamicLinks/FIRDynamicLinks.m

@@ -129,36 +129,36 @@ + (void)load {
                                                            isRequired:NO];
   FIRComponentCreationBlock creationBlock =
       ^id _Nullable(FIRComponentContainer *container, BOOL *isCacheable) {
+    // Don't return an instance when it's not the default app.
+    if (!container.app.isDefaultApp) {
+      // Only configure for the default FIRApp.
+      FDLLog(FDLLogLevelInfo, FDLLogIdentifierSetupNonDefaultApp,
+             @"Firebase Dynamic Links only "
+              "works with the default app.");
+      return nil;
+    }
+
     // Ensure it's cached so it returns the same instance every time dynamicLinks is called.
     *isCacheable = YES;
     id<FIRAnalyticsInterop> analytics = FIR_COMPONENT(FIRAnalyticsInterop, container);
-    return [[FIRDynamicLinks alloc] initWithAnalytics:analytics];
+    FIRDynamicLinks *dynamicLinks = [[FIRDynamicLinks alloc] initWithAnalytics:analytics];
+    [dynamicLinks configureDynamicLinks:container.app];
+    // Check for pending Dynamic Link automatically if enabled, otherwise we expect the developer to
+    // call strong match FDL API to retrieve a pending link.
+    if ([FIRDynamicLinks isAutomaticRetrievalEnabled]) {
+      [dynamicLinks checkForPendingDynamicLink];
+    }
+    return dynamicLinks;
   };
   FIRComponent *dynamicLinksProvider =
       [FIRComponent componentWithProtocol:@protocol(FIRDynamicLinksInstanceProvider)
-                      instantiationTiming:FIRInstantiationTimingLazy
+                      instantiationTiming:FIRInstantiationTimingEagerInDefaultApp
                              dependencies:@[ analyticsDep ]
                             creationBlock:creationBlock];
 
   return @[ dynamicLinksProvider ];
 }
 
-+ (void)configureWithApp:(FIRApp *)app {
-  if (!app.isDefaultApp) {
-    // Only configure for the default FIRApp.
-    FDLLog(FDLLogLevelInfo, FDLLogIdentifierSetupNonDefaultApp,
-           @"Firebase Dynamic Links only "
-            "works with the default app.");
-    return;
-  }
-  [[FIRDynamicLinks dynamicLinks] configureDynamicLinks:app];
-  // check for pending Dynamic Link automatically if enabled
-  // otherwise we expect developer to call strong match FDL API to retrieve link
-  if ([FIRDynamicLinks isAutomaticRetrievalEnabled]) {
-    [[FIRDynamicLinks dynamicLinks] checkForPendingDynamicLink];
-  }
-}
-
 - (void)configureDynamicLinks:(FIRApp *)app {
   FIROptions *options = app.options;
   NSError *error;
@@ -181,11 +181,11 @@ - (void)configureDynamicLinks:(FIRApp *)app {
   if (!errorDescription) {
     // setup FDL if no error detected
     urlScheme = options.deepLinkURLScheme ?: [NSBundle mainBundle].bundleIdentifier;
-    [[FIRDynamicLinks dynamicLinks] setUpWithLaunchOptions:nil
-                                                    apiKey:options.APIKey
-                                                  clientID:options.clientID
-                                                 urlScheme:urlScheme
-                                              userDefaults:nil];
+    [self setUpWithLaunchOptions:nil
+                          apiKey:options.APIKey
+                        clientID:options.clientID
+                       urlScheme:urlScheme
+                    userDefaults:nil];
   } else {
     error =
         [FIRApp errorForSubspecConfigurationFailureWithDomain:kFirebaseDurableDeepLinkErrorDomain

Firebase/Messaging/FIRMessaging.m

@@ -225,6 +225,13 @@ + (void)load {
       [FIRDependency dependencyWithProtocol:@protocol(FIRAnalyticsInterop) isRequired:NO];
   FIRComponentCreationBlock creationBlock =
       ^id _Nullable(FIRComponentContainer *container, BOOL *isCacheable) {
+    if (!container.app.isDefaultApp) {
+      // Only start for the default FIRApp.
+      FIRMessagingLoggerDebug(kFIRMessagingMessageCodeFIRApp001,
+                              @"Firebase Messaging only works with the default app.");
+      return nil;
+    }
+
     // Ensure it's cached so it returns the same instance every time messaging is called.
     *isCacheable = YES;
     id<FIRAnalyticsInterop> analytics = FIR_COMPONENT(FIRAnalyticsInterop, container);
@@ -233,28 +240,19 @@ + (void)load {
                                  withInstanceID:[FIRInstanceID instanceID]
                                withUserDefaults:[GULUserDefaults standardUserDefaults]];
     [messaging start];
+    [messaging configureNotificationSwizzlingIfEnabled];
     return messaging;
   };
   FIRComponent *messagingProvider =
       [FIRComponent componentWithProtocol:@protocol(FIRMessagingInstanceProvider)
-                      instantiationTiming:FIRInstantiationTimingLazy
+                      instantiationTiming:FIRInstantiationTimingEagerInDefaultApp
                              dependencies:@[ analyticsDep ]
                            creationBlock:creationBlock];
 
   return @[ messagingProvider ];
 }
 
-+ (void)configureWithApp:(FIRApp *)app {
-  if (!app.isDefaultApp) {
-    // Only configure for the default FIRApp.
-    FIRMessagingLoggerDebug(kFIRMessagingMessageCodeFIRApp001,
-                            @"Firebase Messaging only works with the default app.");
-    return;
-  }
-  [[FIRMessaging messaging] configureMessaging:app];
-}
-
-- (void)configureMessaging:(FIRApp *)app {
+- (void)configureNotificationSwizzlingIfEnabled {
   // Swizzle remote-notification-related methods (app delegate and UNUserNotificationCenter)
   if ([FIRMessagingRemoteNotificationsProxy canSwizzleMethods]) {
     NSString *docsURLString = @"https://firebase.google.com/docs/cloud-messaging/ios/client"