you can steal all your scripts:
steal.plugins('foo/bar','abc')
then run the build app:
steal buildjs mypage.html
It finds all scripts, minifies, combines them into 1.
But you can also do a multi-build.
This takes several pages and combines shared scripts to be loaded in parallel. This usually is done so 2 scripts load per page. This is good for pages that have a lot of shared scripts.