 					}
 					
 					dispatch_async(self.queue4) {
-						for i in 1...500 {
+						for i in 1...5 {
 							let prop: String = String(i)
 							a1!.removeGroup(prop)
 							a1!.addGroup("test")

					a1![prop] = nil
				}
				dispatch_async(self.queue3) {
					for i in 1...1000 {
						let prop: String = String(i)
						a1!.addGroup(prop)
						a1!.addGroup("test")

			}
			
			dispatch_async(self.queue2) {
				for i in 1...5 {
					let prop: String = String(i)
					a1!.removeGroup(prop)
					a1!.addGroup("test")
