Rudimentary local echo prediction.


git-svn-id: svn+ssh://svnrepo/projects/tachyon/trunk@6740 561c3618-0fe6-0310-b5d6-fc65c73fee30
Only predict if we are doing well enough.


git-svn-id: svn+ssh://svnrepo/projects/tachyon/trunk@6741 561c3618-0fe6-0310-b5d6-fc65c73fee30