Okay. This might actually is working. I'm still testing. I modified my arts build script to build from svn rather than a copy in tmpfs. The whole thing worked several times. First build was 4+ minutes and the other builds were 1.5 minutes. Next I tried kdeutils. First build was 10 minutes. Subsequent two builds were 2 minutes. The problem I had this afternoon would seem limited to building tqtinterface from within svn. Fortunately that is a short build and my copy method will suffice. Odd. So now my question is when or how often should I run 'make clean' within the svn tree? Running 'make clean' offset the effects of ccache.