about rendering animation...

i made a animated texture (stream of water) and i want to see the result…
in the anim pannel, i pressed ANIM button and it takes forever.
and everytime i make a change, i have to render it all over again…
such a pain in the butt and im wondering if there is any other faster way.

You may try reading this: http://www.blenderguru.com/13-ways-to-reduce-render-times/.
Turn off OSA also, in the Render panel.