ios - 将 100 万条记录保存到核心数据需要花费大量时间

Question

我正在将 100 万条记录从 CSV 保存到核心数据库。保存所有记录大约需要35分钟左右。有没有办法减少插入时间。这是我用来插入记录的代码:

 NSString *resourceFileName = @"npidata_20140209_reduced2";
NSString *pathToFile =[[NSBundle mainBundle] pathForResource: resourceFileName ofType: @"csv"];

NSString* content = [NSString stringWithContentsOfFile:pathToFile
                                              encoding:NSUTF8StringEncoding
                                                 error:NULL];
__block int count = 0;

[内容 enumerateLinesUsingBlock:^(NSString *line, BOOL *stop) { NSLog(@"LINE==%@",line);

    NSArray *lineComponents=[line componentsSeparatedByString:@","];
    if(lineComponents){       
            float f=[[lineComponents objectAtIndex:0] floatValue];
            NSString *strNPI=[lineComponents objectAtIndex:0];
            NSString *strProviderLastName=[lineComponents objectAtIndex:1];
            NSString *strProviderFirstName=[lineComponents objectAtIndex:2];
            NSString *strLicenseNumber=[lineComponents objectAtIndex:6];
            NSString *strLicenseState=[lineComponents objectAtIndex:7];         
            NSManagedObject *object=[NSEntityDescription insertNewObjectForEntityForName:@"AttendeeInformation" inManagedObjectContext:[DataBaseManager sharedInstance].managedObjectContext];

            NSString *strFullName = [NSString stringWithFormat:@"%@ %@",strProviderFirstName,strProviderLastName];

            [object setValue:strNPI forKey:@"npiNumber"];
            [object setValue:strProviderFirstName forKey:@"attendeeFirstName"];
            [object setValue:strProviderLastName forKey:@"attendeeLastName"];
            [object setValue:strFullName forKey:@"attendeeName"];
            [object setValue:strLicenseNumber forKey:@"licnesedNumber"];
            [object setValue:strLicenseState forKey:@"stateLicense"];

            NSError *error;
            count++;
            if(count%100==0)
            {
                if (![[DataBaseManager sharedInstance].managedObjectContext save:&error])
                {
                    NSLog(@"Whoops, couldn't save: %@", [error localizedDescription]);
                }
                [[DataBaseManager sharedInstance].managedObjectContext refreshObject:object mergeChanges:YES];
            }
        if (count==lineComponents.count)
        {
            completionHandler();
        }
    }
}];

Answer 1

您应该使用时间配置文件和核心数据运行 Instruments 以查看您的瓶颈是什么。这是验证性能问题的最佳方式。 Core Data 可能是也可能不是你的问题。