I am currently struggling with the build performance of ANT with websphere server.
My application is based on huge multiple projects and every time a project build done takes around 45 mins with ANT.

I investigated to find that the script done by the team always do a Clean-build, that is to scratch everything and do a build for each object again instead of just modified objects.

I would like to know the impacts of changing clean build to a normal build and it will be good to understand the differences.