The maven-war-plugin has an overlays feature that is used by the following modules:
This task involves investigating the configuration options of the overlay feature to see if the build performance can be improved.
For example, in the case of alloy-showcase-webapp.war, the overlay feature will extract ALL of the jars from jsf-showcase-webapp.war. It might be the case that after the extraction, the maven-war-plugin clobber them with the same jars (since they are dependencies), effectively writing the jar files twice.
Need to see if perhaps the <excludes> or <dependentWarExcludes> configuration option might speed up the build process.