NSAutoReleasePool in iOS 5

So we used to use NSAutoReleasePool prior to iOS 5 as following

     NSAutoreleasePool *pool = [[NSAutoreleasePool alloc]init];  
      ..  
     code  
     ...  
      [pool release];  

With arrival of iOS 5, you can use it as following:

 @autoreleasepool {  
     // Code benefitting from a local autorelease pool.  
     [UIView beginAnimations:nil context:nil];  
     [UIView setAnimationDuration:0.5];  
     [UIView setAnimationRepeatCount:100];  
     view.transform = CGAffineTransformMakeScale(1.0, 1.0);  
     [UIView commitAnimations];  
   }