deployment - Websphere 7 takes a very long time to deploy a war -

I'm trying to deploy a war in Websphere 7 / Windows 7. I tried both methods, and command line from GUI console. From the command line, I tried

  wsadmin> $ AdminApp install c: /app.war  

In both cases it takes a very long time to terminate, there is really nothing special about the hour deployed application, such as Time-consuming work done in the initial time. Why is it like this? On the same server, an update of an already existing app expires in minutes. What is the way to make the deployment faster?