The Openfire build script uses Pack200 to compress plugins. This adds a lot of time to the build process (in my example, it's easily trippled). This doesn't make sense if you run Openfire on the same machine as where you ran the buildscript: the first thing that Openfire does, after it gets started, is unpacking it again.
The build script should be modified to make packing optional.
The attached patch modifies the Ant buildscript to work based on a boolean value (default: true). If set to false, pack200 will not be used.
Before loading a plugin, Openfire will simply unpack all .pack files, if any are available the plugin lib directory. Not building .pack-files will not affect plugin loading.