How long should a testless build take?

I'm seriously wondering whether I have something set up wrong.

I've set this to try to avoid the memory errors:
export ANT_OPTS="-Xmx1024m -XX:MaxPermSize=256m"

But running this, I get 3 cores pegged for ... over an hour so far.
ant -f multibuild.xml continuous-local-testless

Is that normal, or should I look for something wrong with my Java dev machine?

Thanks!

wow:
BUILD SUCCESSFUL
Total time: 195 minutes 47 seconds