background fetching causes app freeze than foreground fetching

Question

I have implemented background fetching in coredata, but it still getting app freeze few seconds than normal fetching. Is there any thing i can do for fast fetching?Seems that it still fetching on foreground,don't know what is wrong with code.

- (void)sr_executeFetchRequest:(NSFetchRequest *)request completion:(void (^)(NSArray *objects, NSError *error))completion {

NSString *loginUser=[[NSUserDefaults standardUserDefaults] valueForKey:@"currentUser"];

AppDelegate *sharedDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
NSPersistentStoreCoordinator *coordinator = [sharedDelegate persistentStoreCoordinator];
NSManagedObjectContext *context = [sharedDelegate managedObjectContext];

NSManagedObjectContext *backgroundContext = [[NSManagedObjectContext alloc] initWithConcurrencyType:NSPrivateQueueConcurrencyType];
    backgroundContext.persistentStoreCoordinator = coordinator;

[backgroundContext performBlock:^{

    // Fetch into shared persistent store in background thread
    NSError *error = nil;
    //        NSLog(@"BG thread===== ");

    NSArray *fetchedObjects = [backgroundContext executeFetchRequest:request error:&error];

    [context performBlock:^{
        if (fetchedObjects) {
            // Collect object IDs
            NSMutableArray *mutObjectIds = [[NSMutableArray alloc] initWithCapacity:[fetchedObjects count]];
            for (NSManagedObject *obj in fetchedObjects) {
                [mutObjectIds addObject:obj.objectID];
    //                    NSLog(@"BG bg===== ");

            }

            // Fault in objects into current context by object ID as they are available in the shared persistent store
            NSMutableArray *mutObjects = [[NSMutableArray alloc] initWithCapacity:[mutObjectIds count]];
            for (NSManagedObjectID *objectID in mutObjectIds) {
                NSManagedObject *obj = [context objectWithID:objectID];
                [mutObjects addObject:obj];
   //                    NSLog(@"BG fg===== ");

            }

            if (completion) {
                NSArray *objects = [mutObjects copy];
                completion(objects, nil);
            }
        } else {
            if (completion) {
                completion(nil, error);
            }
        }
    }];
}];
}

I have some records in server, when background to foreground the app server will send all the records and from client side i'm savings all data into coredata. While saving i need to check whether those data are already exist or not,and sometimes i need to fetch some data from db before save, but in these time my app became frozen, and its working fine only after all updates and savings are done.

Profiler trace https://www.dropbox.com/s/6b1gykvs1pezrcp/Instruments4.trace.zip?dl=0

SAVE to DB

     -(void)updateThreadEntityWithSyncDetails:(NSMutableDictionary *)inDictionary
  {

 NSString *loginUser=[[NSUserDefaults standardUserDefaults] valueForKey:@"currentUser"];

 AppDelegate *sharedDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
NSManagedObjectContext *context = [sharedDelegate managedObjectContext];

  //    NSManagedObjectContext *writerContext = [[NSManagedObjectContext alloc] initWithConcurrencyType:NSPrivateQueueConcurrencyType];
  //   [writerContext setPersistentStoreCoordinator:[sharedDelegate persistentStoreCoordinator]];
 ////    
  ////    // create main thread MOC
 //    context = [[NSManagedObjectContext alloc]        initWithConcurrencyType:NSMainQueueConcurrencyType];
    //    context.parentContext = writerContext;
  ////

NSManagedObjectContext *contextforThread = [[NSManagedObjectContext alloc] initWithConcurrencyType:NSPrivateQueueConcurrencyType];

contextforThread.parentContext = context;

[contextforThread performBlock:^{




NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
[fetchRequest setReturnsObjectsAsFaults:NO];
NSEntityDescription *entity = [NSEntityDescription entityForName:@"ThreadInfo"
                                          inManagedObjectContext:context];
[fetchRequest setEntity:entity];
NSPredicate *userPredicate = [NSPredicate predicateWithFormat:@"userEmail == %@",loginUser];
NSPredicate *threadPredicate = [NSPredicate predicateWithFormat:@"threadID == %@",[inDictionary valueForKey:@"thread"]];
NSPredicate *compoundPredicate = [NSCompoundPredicate andPredicateWithSubpredicates: @[userPredicate, threadPredicate]];
[fetchRequest setPredicate:compoundPredicate];

NSArray *fetchedObjects = [context executeFetchRequest:fetchRequest error:nil];
for (ThreadInfo *threadInfo in fetchedObjects)
{
    if([[inDictionary allKeys] containsObject:@"userEmail"])
    {
        if([inDictionary valueForKey:@"userEmail"]!=[NSNull null])
        {
            threadInfo.userEmail=[inDictionary valueForKey:@"userEmail"];
        }
    }
    if([[inDictionary allKeys] containsObject:@"badgeValue"])
    {
        if([inDictionary valueForKey:@"badgeValue"]!=[NSNull null])
        {
            threadInfo.badgeValue=[inDictionary valueForKey:@"badgeValue"];
        }
    }

    if([[inDictionary allKeys] containsObject:@"thread"])
    {
        if([inDictionary valueForKey:@"thread"]!=[NSNull null])
        {
            threadInfo.threadID=[inDictionary valueForKey:@"thread"];
        }
    }
    if([[inDictionary allKeys] containsObject:@"key"])
    {
        if([inDictionary valueForKey:@"key"]!=[NSNull null])
        {
            threadInfo.threadKey=[inDictionary valueForKey:@"key"];
        }
    }
    if([[inDictionary allKeys] containsObject:@"secret_seed"])
    {
        if([inDictionary valueForKey:@"secret_seed"]!=[NSNull null])
        {
            threadInfo.threadSecret=[NSString stringWithFormat:@"%@",[inDictionary valueForKey:@"secret_seed"]];
        }
    }
    if([[inDictionary allKeys] containsObject:@"r_key"])
    {
        if([inDictionary valueForKey:@"r_key"]!=[NSNull null])
        {
            threadInfo.remoteKey=[inDictionary valueForKey:@"r_key"];
        }
    }
    if([[inDictionary allKeys] containsObject:@"solicitation"])
    {
        if([inDictionary valueForKey:@"solicitation"]!=[NSNull null])
        {
            threadInfo.solicitationID=[inDictionary valueForKey:@"solicitation"];
        }
    }
    if([[inDictionary allKeys] containsObject:@"r_secret"])
    {
        if([inDictionary valueForKey:@"r_secret"]!=[NSNull null])
        {
            threadInfo.remoteSecret=[inDictionary valueForKey:@"r_secret"];
        }
    }
    if([[inDictionary allKeys] containsObject:@"icon_idx"])
    {
        if([inDictionary valueForKey:@"icon_idx"]!=[NSNull null])
        {
            threadInfo.avatarIconIndex=[inDictionary valueForKey:@"icon_idx"];
        }
    }

    if([[inDictionary allKeys] containsObject:@"icon_color_idx"])
    {
        if([inDictionary valueForKey:@"icon_color_idx"]!=[NSNull null])
        {
            threadInfo.avatarColorIndex=[inDictionary valueForKey:@"icon_color_idx"];
        }
    }

    if([[inDictionary allKeys] containsObject:@"encrypted_r_secret"])
    {
        if([inDictionary valueForKey:@"encrypted_r_secret"]!=[NSNull null])
        {
            threadInfo.encryptedRemoteSecret=[inDictionary valueForKey:@"encrypted_r_secret"];
        }
    }
    if([[inDictionary allKeys] containsObject:@"isSystemMessage"])
    {
        if([inDictionary valueForKey:@"isSystemMessage"]!=[NSNull null])
        {
            threadInfo.isSystemMessage=[inDictionary valueForKey:@"isSystemMessage"];
        }
    }
    if([[inDictionary allKeys] containsObject:@"ref"])
    {
        if([inDictionary valueForKey:@"ref"]!=[NSNull null])
        {
            threadInfo.systemReferenceURL=[inDictionary valueForKey:@"ref"];
        }
    }
    if([[inDictionary allKeys] containsObject:@"url"])
    {
        if([inDictionary valueForKey:@"url"]!=[NSNull null])
        {
            threadInfo.systemMessageURL=[inDictionary valueForKey:@"url"];
        }
    }
    if([[inDictionary allKeys] containsObject:@"thumbnailImageURL"])
    {
        if([inDictionary valueForKey:@"thumbnailImageURL"]!=[NSNull null])
        {
            threadInfo.thumbnailImageURL=[inDictionary valueForKey:@"thumbnailImageURL"];
        }
    }
    if([[inDictionary allKeys] containsObject:@"from"])
    {
        if([inDictionary valueForKey:@"from"]!=[NSNull null])
        {
            threadInfo.receiverEmail=[inDictionary valueForKey:@"from"];
        }
    }
    if([[inDictionary allKeys] containsObject:@"isQuiz"])
    {
        if([inDictionary valueForKey:@"isQuiz"]!=[NSNull null])
        {
            threadInfo.isQuiz=[inDictionary valueForKey:@"isQuiz"];
        }
    }
    if([[inDictionary allKeys] containsObject:@"replied"])
    {
        if([inDictionary valueForKey:@"replied"]!=[NSNull null])
        {
            threadInfo.replied=[inDictionary valueForKey:@"replied"];
        }
    }
    if([[inDictionary allKeys] containsObject:@"owned"])
    {
        if([inDictionary valueForKey:@"owned"]!=[NSNull null])
        {
            BOOL isOwner=[[inDictionary valueForKey:@"owned"] boolValue];
            if([[inDictionary allKeys] containsObject:@"solicitation"])
            {
                if([inDictionary valueForKey:@"solicitation"]!=[NSNull null])
                {

                    if(isOwner)
                    {

                        if ([[inDictionary valueForKey:@"solicitation"] isEqualToString:[inDictionary valueForKey:@"thread"]])
                        {
                            threadInfo.isRequester=[NSNumber numberWithBool:YES];

                        } else {
                            threadInfo.isSender=[NSNumber numberWithBool:YES];

                        }

                    }
                    else
                    {
                        //                            threadInfo.isProvider=[NSNumber numberWithBool:YES];

                        if ([[inDictionary valueForKey:@"solicitation"] isEqualToString:[inDictionary valueForKey:@"thread"]])
                        {
                            threadInfo.isProvider=[NSNumber numberWithBool:YES];

                        } else {
                            threadInfo.isReceiver=[NSNumber numberWithBool:YES];

                        }

                    }
                }
                else
                {
                    if(isOwner)
                    {
                        threadInfo.isSender=[NSNumber numberWithBool:YES];

                    }
                    else
                    {
                        threadInfo.isReceiver=[NSNumber numberWithBool:YES];

                    }

                }
            }
            else
            {
                if(isOwner)
                {
                    threadInfo.isSender=[NSNumber numberWithBool:YES];

                }
                else
                {
                    threadInfo.isReceiver=[NSNumber numberWithBool:YES];

                }
            }


        }

    }
    if([[inDictionary allKeys] containsObject:@"options"])
    {
        if([inDictionary valueForKey:@"options"]!=[NSNull null])
        {
            NSMutableArray *accArray=[inDictionary valueForKey:@"options"];
            NSData *arrayData = [NSKeyedArchiver archivedDataWithRootObject:accArray];
            threadInfo.pollOptions = arrayData;
        }
    }

    if([[inDictionary allKeys] containsObject:@"isAnyReceiverActivity"])
    {
        if([inDictionary valueForKey:@"isAnyReceiverActivity"]!=[NSNull null])
        {
            threadInfo.isAnyReceiverActivity=[inDictionary valueForKey:@"isAnyReceiverActivity"];
        }
    }
    if([[inDictionary allKeys] containsObject:@"pollAnswerList"])
    {
        if([inDictionary valueForKey:@"pollAnswerList"]!=[NSNull null])
        {
            NSMutableDictionary *accDict=[inDictionary valueForKey:@"pollAnswerList"];
            NSData *dictData = [NSKeyedArchiver archivedDataWithRootObject:accDict];
            threadInfo.pollAnswerList = dictData;
        }
    }
    if([[inDictionary allKeys] containsObject:@"responseCount"])
    {
        if([inDictionary valueForKey:@"responseCount"]!=[NSNull null])
        {
            threadInfo.responseCount=[inDictionary valueForKey:@"responseCount"];
        }
    }

    if([[inDictionary allKeys] containsObject:@"isSender"])
    {
        if([inDictionary valueForKey:@"isSender"]!=[NSNull null])
        {
            threadInfo.isSender=[NSNumber numberWithBool:[[inDictionary valueForKey:@"isSender"] boolValue]];
        }
    }

    if([[inDictionary allKeys] containsObject:@"isRequester"])
    {
        if([inDictionary valueForKey:@"isRequester"]!=[NSNull null])
        {
            threadInfo.isRequester=[NSNumber numberWithBool:[[inDictionary valueForKey:@"isRequester"] boolValue]];
        }
    }
    if([[inDictionary allKeys] containsObject:@"image"])
    {
        if([inDictionary valueForKey:@"image"]!=[NSNull null])
        {
             threadInfo.image=[inDictionary valueForKey:@"image"];
        }
    }


    if([[inDictionary allKeys] containsObject:@"isReceiver"])
    {
        if([inDictionary valueForKey:@"isReceiver"]!=[NSNull null])
        {
            threadInfo.isReceiver=[NSNumber numberWithBool:[[inDictionary valueForKey:@"isReceiver"] boolValue]];
        }
    }
    if([[inDictionary allKeys] containsObject:@"colorCode"])
    {
        if([inDictionary valueForKey:@"colorCode"]!=[NSNull null])
        {
            threadInfo.colorCode=[inDictionary valueForKey:@"colorCode"];
        }
    }
    if([[inDictionary allKeys] containsObject:@"solicitationCount"])
    {
        if([inDictionary valueForKey:@"solicitationCount"]!=[NSNull null])
        {
            threadInfo.solicitationCount=[inDictionary valueForKey:@"solicitationCount"];
        }
    }
    if([[inDictionary allKeys] containsObject:@"solicitationNumber"])
    {
        if([inDictionary valueForKey:@"solicitationNumber"]!=[NSNull null])
        {
            threadInfo.solicitationNumber=[inDictionary valueForKey:@"solicitationNumber"];
        }
    }


    if([[inDictionary allKeys] containsObject:@"disliked"])
    {
        if([inDictionary valueForKey:@"disliked"]!=[NSNull null])
        {
            threadInfo.hasDislikes=[NSNumber numberWithBool:[[inDictionary valueForKey:@"disliked"] boolValue]];
        }
    }

    if([[inDictionary allKeys] containsObject:@"liked"])
    {
        if([inDictionary valueForKey:@"liked"]!=[NSNull null])
        {
            threadInfo.hasLikes=[NSNumber numberWithBool:[[inDictionary valueForKey:@"liked"] boolValue]];
        }
    }
    if([[inDictionary allKeys] containsObject:@"removed"])
    {
        if([inDictionary valueForKey:@"removed"]!=[NSNull null])
        {
            threadInfo.isThreadRemoved=[NSNumber numberWithBool:[[inDictionary valueForKey:@"removed"] boolValue]];
        }
    }
    if([[inDictionary allKeys] containsObject:@"closed"])
    {
        if([inDictionary valueForKey:@"closed"]!=[NSNull null])
        {
            threadInfo.isThreadEnded=[NSNumber numberWithBool:[[inDictionary valueForKey:@"closed"] boolValue]];
        }
    }
    if([[inDictionary allKeys] containsObject:@"blocked"])
    {
        if([inDictionary valueForKey:@"blocked"]!=[NSNull null])
        {
            threadInfo.isThreadBlocked=[NSNumber numberWithBool:[[inDictionary valueForKey:@"blocked"] boolValue]];
        }
    }
    if([[inDictionary allKeys] containsObject:@"hasComments"])
    {
        if([inDictionary valueForKey:@"hasComments"]!=[NSNull null])
        {
            threadInfo.hasComments=[NSNumber numberWithBool:[[inDictionary valueForKey:@"hasComments"] boolValue]];
        }
    }
    if([[inDictionary allKeys] containsObject:@"isProvider"])
    {
        if([inDictionary valueForKey:@"isProvider"]!=[NSNull null])
        {
            threadInfo.isProvider=[NSNumber numberWithBool:[[inDictionary valueForKey:@"isProvider"] boolValue]];
        }
    }

    if([[inDictionary allKeys] containsObject:@"messageDescription"])
    {
        if([inDictionary valueForKey:@"messageDescription"]!=[NSNull null])
        {
            threadInfo.messageDescription=[inDictionary valueForKey:@"messageDescription"];
        }
    }

    if([[inDictionary allKeys] containsObject:@"commentCount"])
    {
        if([inDictionary valueForKey:@"commentCount"]!=[NSNull null])
        {
            threadInfo.commentCount=[NSNumber numberWithInteger:[[inDictionary valueForKey:@"commentCount"] integerValue]];
        }

    }
    if([[inDictionary allKeys] containsObject:@"threadDate"])
    {
        if([inDictionary valueForKey:@"threadDate"]!=[NSNull null])
        {
            threadInfo.threadDate=[inDictionary valueForKey:@"threadDate"];
        }
    }
    if([[inDictionary allKeys] containsObject:@"receivedDate"])
    {
        if([inDictionary valueForKey:@"receivedDate"]!=[NSNull null])
        {
            threadInfo.receivedDate=[inDictionary valueForKey:@"receivedDate"];
        }
    }
    if([[inDictionary allKeys] containsObject:@"closedDate"])
    {
        if([inDictionary valueForKey:@"closedDate"]!=[NSNull null])
        {
            threadInfo.closedDate=[inDictionary valueForKey:@"closedDate"];
        }
    }

    if([[inDictionary allKeys] containsObject:@"blockedDate"])
    {
        if([inDictionary valueForKey:@"blockedDate"]!=[NSNull null])
        {
            threadInfo.blockedDate=[inDictionary valueForKey:@"blockedDate"];
        }
    }


    if([[inDictionary allKeys] containsObject:@"threadDescription"])
    {
        if([inDictionary valueForKey:@"threadDescription"]!=[NSNull null])
        {
            threadInfo.threadMessage=[inDictionary valueForKey:@"threadDescription"];
        }
    }

    if([[inDictionary allKeys] containsObject:@"receiverEmail"])
    {
        if([inDictionary valueForKey:@"receiverEmail"]!=[NSNull null])
        {
            threadInfo.receiverEmail=[inDictionary valueForKey:@"receiverEmail"];
        }
    }

    if([[inDictionary allKeys] containsObject:@"to"])
    {
        if([inDictionary valueForKey:@"to"]!=[NSNull null])
        {
            id toValue=[inDictionary valueForKey:@"to"];
            if([toValue isKindOfClass:[NSString class]])
            {
                if ([toValue rangeOfString:@"@"].location != NSNotFound)
                {
                    threadInfo.receiverEmail=[NSString stringWithFormat:@"%@",toValue];
                }
            }
            else
            {
                NSMutableArray *accArray=[NSMutableArray arrayWithArray:toValue];
                NSData *arrayData = [NSKeyedArchiver archivedDataWithRootObject:accArray];
                threadInfo.solicitationList = arrayData;
            }

        }

    }
    //Poll
    if([[inDictionary allKeys] containsObject:@"isPoll"])
    {
        if([inDictionary valueForKey:@"isPoll"]!=[NSNull null])
        {
            threadInfo.isPoll=[inDictionary valueForKey:@"isPoll"];
        }
    }
    if([[inDictionary allKeys] containsObject:@"type"])
    {
        if([inDictionary valueForKey:@"type"]!=[NSNull null])
        {
            threadInfo.pollType=[inDictionary valueForKey:@"type"];
        }
    }
    if([[inDictionary allKeys] containsObject:@"scope"])
    {
        if([inDictionary valueForKey:@"scope"]!=[NSNull null])
        {
            threadInfo.pollScope=[inDictionary valueForKey:@"scope"];
        }
    }
    if([[inDictionary allKeys] containsObject:@"isPollSender"])
    {
        if([inDictionary valueForKey:@"isPollSender"]!=[NSNull null])
        {
            threadInfo.isPollSender=[inDictionary valueForKey:@"isPollSender"];
        }
    }

    if([[inDictionary allKeys] containsObject:@"visibility"])
    {
        if([inDictionary valueForKey:@"visibility"]!=[NSNull null])
        {
            threadInfo.pollVisibility=[inDictionary valueForKey:@"visibility"];
        }
    }

    if([[inDictionary allKeys] containsObject:@"yesPercentage"])
    {
        if([inDictionary valueForKey:@"yesPercentage"]!=[NSNull null])
        {
            threadInfo.yesPercentage=[inDictionary valueForKey:@"yesPercentage"];
        }
    }
    if([[inDictionary allKeys] containsObject:@"noPercentage"])
    {
        if([inDictionary valueForKey:@"noPercentage"]!=[NSNull null])
        {
            threadInfo.noPercentage=[inDictionary valueForKey:@"noPercentage"];
        }
    }

    if([[inDictionary allKeys] containsObject:@"selectedOption"])
    {
        if([inDictionary valueForKey:@"selectedOption"]!=[NSNull null])
        {
            threadInfo.selectedOption=[inDictionary valueForKey:@"selectedOption"];
        }
    }
    if([[inDictionary allKeys] containsObject:@"selectedStar"])
    {
        if([inDictionary valueForKey:@"selectedStar"]!=[NSNull null])
        {
            threadInfo.selectedStar=[inDictionary valueForKey:@"selectedStar"];
        }
    }

            if([[inDictionary allKeys] containsObject:@"choice1Percentage"])
    {
        if([inDictionary valueForKey:@"choice1Percentage"]!=[NSNull null])
        {
            threadInfo.choice1Percentage=[inDictionary valueForKey:@"choice1Percentage"];
        }
    }
    if([[inDictionary allKeys] containsObject:@"choice2Percentage"])
    {
        if([inDictionary valueForKey:@"choice2Percentage"]!=[NSNull null])
        {
            threadInfo.choice2Percentage=[inDictionary valueForKey:@"choice2Percentage"];
        }
    }
    if([[inDictionary allKeys] containsObject:@"choice3Percentage"])
    {
        if([inDictionary valueForKey:@"choice3Percentage"]!=[NSNull null])
        {
            threadInfo.choice3Percentage=[inDictionary valueForKey:@"choice3Percentage"];
        }
    }
    if([[inDictionary allKeys] containsObject:@"choice4Percentage"])
    {
        if([inDictionary valueForKey:@"choice4Percentage"]!=[NSNull null])
        {
            threadInfo.choice4Percentage=[inDictionary valueForKey:@"choice4Percentage"];
        }
    }
    if([[inDictionary allKeys] containsObject:@"choice5Percentage"])
    {
        if([inDictionary valueForKey:@"choice5Percentage"]!=[NSNull null])
        {
            threadInfo.choice5Percentage=[inDictionary valueForKey:@"choice5Percentage"];
        }
    }

 }

    NSError *error;
    if(![contextforThread save:&error]) {
        NSLog(@"Child error : %@",error);

    }

    [context performBlock:^{
        NSError *error;
        if(![context save:&error]) {
            NSLog(@"%@",error);
        }
               }];
}];


 }     

websocket //继续从服务器获取数据

 - (void)webSocket:(SRWebSocket *)webSocket didReceiveMessage:(id)message
  {
           NSDictionary *responseDict = [message JSONValue];
     NSArray *bodyDicta=[responseDict objectForKey:@"body"];
                for (int i=0; i<bodyDicta.count; i++) {
                    int responseCode=[[[[responseDict objectForKey:@"body"] objectAtIndex:i ] objectForKey:@"code"] intValue];


                    [self checkResponseCode:[bodyDicta objectAtIndex: i] indexvalue:responseCode isArray:1];
 }

checkResponseCode

  -(void)checkResponseCode:(NSDictionary *)responseDict indexvalue:(int)code isArray:(int)flag {

   if(code==3608)
   {
    [self manageGroupDetails:responseDict];
    }

  if (code == 3602)// SCROLL ISSUE
   {

    [self updateThreadWithSyncDetails:responseDict];
   }
   if (code == 3603)
   {

    [self updateCommentWithSyncDetails:responseDict];
   }
   if(code==3607)// SCROLL ISSUE
  {
    [self updateSolicitationWithSyncDetails:responseDict];
  }
}

updatePollWithSyncDetails

-(void)updatePollWithSyncDetails:(NSDictionary *)responseDict
 {
     BOOL isDuplicate=[[IXDataBaseManager sharedNetworkDataManager] checkForExistenceOfThreadDetailsForThreadID:[responseDict objectForKey:@"poll"]];
if(!isDuplicate)
{
             [[IXDataBaseManager sharedNetworkDataManager] updateThreadEntityWithSyncDetails:detailsDict];
 }

updateSolicitationWithSyncDetails

 -(void)updateSolicitationWithSyncDetails:(NSDictionary *)inDictionary
 {
 NSMutableDictionary *paramDict=[NSMutableDictionary dictionaryWithDictionary:inDictionary];
 NSString *userEmail=[[NSUserDefaults standardUserDefaults] valueForKey:@"currentUser"];
[paramDict setObject:[NSNumber numberWithBool:NO] forKey:@"isSystemMessage"];                          
                [paramDict setObject:message forKey:@"threadDescription"];
                ThreadInfo *threadInfo=[[IXDataBaseManager sharedNetworkDataManager] retrieveSolicitationInfoForThreadID:[inDictionary objectForKey:@"solicitation"]];
                [paramDict setObject:threadInfo.threadID forKey:@"thread"];
                [[IXDataBaseManager sharedNetworkDataManager] updateThreadEntityWithSyncDetails:paramDict];
            }
        }
 }

Answer 1

首先,您如何知道阻止您的UI的抓取？你有没有运行仪器？如果是这样,迹线在哪里？

如果还没有,则需要停止运行仪器,使用Time Profiler查找块.使用指向跟踪的链接更新您的问题,以便下载和查看.

没有在Instruments中查看这个问题,你只是在猜测,实际问题是什么.

更新1

查看您提供的跟踪,我没有看到Core Data占用主线程(或任何其他线程)的任何大量时间.我怀疑你在这里追逐错误的东西.

您上面的代码不会为您节省任何时间.虽然它会将对象加载到其中NSPersistentStoreCoordinator以使主要NSManagedObjectContext获取它们的速度稍微快一点,但它是无关紧要的.根据您的时间跟踪,您不会花费任何时间在SQL上(主线程上总共132ms).

即使您的SQL调用花费了大量时间,它仍然会阻塞主线程,因为您NSPersistentStoreCoordinator在执行获取时锁定了它.

根据您提供的跟踪,您的问题在您的用户界面中.您花费的大部分时间都是-[IXInBoxViewController tableView;heightForRowAtIndexPath:]锁定UI的常见位置.钻入您的个人资料,找到昂贵的项目并进行修复.

问题不是核心数据.我建议删除此线程代码(添加线程不是一个高性能的解决方案),并返回到使用NSFetchedResultsController与UITableViewController再配置您的UI代码和修复,慢速代码.

更新2

我从服务器获取大量数据,并持续节省核心数据..我正在使用NSFetchedResultsController,因此必须重新加载每个存储tableview.现在我正在尝试保存少量数据,这是处理大量核心数据保存请求的正确方法吗？

您没有提供任何用于加载数据或保存数据的代码,因此无论您是否正确执行这些部分,我都无法说话.

只要加载到后台线程上的后台上下文(我更喜欢使用NSOperation子类)并保存到Core Data中,您加载的数据量就无关紧要了.该NSFetchedResultsController会做正确的事和UI的影响将是最小的,除非你同时显示的数据.如果数据加载到NSFetchedResultsController屏幕中并且它相对偏离屏幕,那么它将不会对性能产生重大影响.

运行仪器.这是性能问题的第一步.

如果数据加载速度很慢,请隔离缓慢的行并解决它们.

如果您的保存很慢(不太可能),那么将其分成小块.

但首先要介绍它.否则你是在黑暗中拍摄而只是猜测.