在点击https url并在iOS中获取数据时响应缓慢

Question

在ViewDidLoad方法中，我添加了以下代码

      self.responseData = [NSMutableData data];
        NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:
                                        [NSURL URLWithString:@"my url"]];
        [request setHTTPShouldHandleCookies:YES];
        [request setHTTPMethod:@"GET"];
        NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
        [connection start];

And When connection start delegate methods are calling

    - (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {

        NSHTTPURLResponse* httpResponse = (NSHTTPURLResponse*)response;
        NSUInteger responseStatusCode = [httpResponse statusCode];
        _responseData = [[NSMutableData alloc] init];

        NSLog(@"connection");
    }

    - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
        // Append the new data to the instance variable you declared
        [_responseData appendData:data];
        NSLog(@"_responseData%@",_responseData);

    }

    - (NSCachedURLResponse *)connection:(NSURLConnection *)connection
                      willCacheResponse:(NSCachedURLResponse*)cachedResponse {

        // Return nil to indicate not necessary to store a cached response for this connection
        return nil;
    }

    - (void)connectionDidFinishLoading:(NSURLConnection *)connection {
        NSError *jError;
        jArray= [NSJSONSerialization JSONObjectWithData:_responseData options:NSJSONReadingMutableContainers error:&jError];    
        [_tableView reloadData];    
    }

    - (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {
        NSLog(@"didFailWithError");
    }

这是我点击HTTPS网址的方式，但显示数据需要更多时间。没有得到什么问题。任何人都可以帮我解决这个问题。