Open Radar

 
Even after invalidate a NSURLSession, running a profile using Instruments, some classes (probably privates) called TubeManager, HTTPConnectionCache and HTTPConnectionCacheDictionary still alive in memory.

Code snippet to reproduce:

NSURLSessionConfiguration* config = [NSURLSessionConfiguration defaultSessionConfiguration];
NSURLSession* session = [NSURLSession sessionWithConfiguration:config];
NSURLRequest* request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://www.google.com"]];
NSURLSessionDataTask* sessionDataTask = [session dataTaskWithRequest:request
                                                   completionHandler:^(NSData *data, NSURLResponse *response, NSError *error)
{
    [session finishTasksAndInvalidate];
}];
[sessionDataTask resume];