Android: build with ant will not reflect change without ant clean

For the past few months I've been developing Android devices. And I am using vim as my main development tool. I just feel comfortable and faster in vim than eclipse .. and since I am using vim .. I use command line tools to build and run my application.

every time i do ant clean && ant debug && ant installd

but using ant clean makes the process long every time .. at least a minute to build and 30 seconds to install.

I tried to skip ant clean up a few times ant debug && ant installd

, but the problem here in my new changes is not reflected without ant clean

..

But my colleagues who use eclipse for android programming tend to be faster in this build and run process. Can anyone explain to me how to increase the performance of command line tools.