It looks like, using cmucl 20c, the following commit
makes cmucl take 442 seconds to execute the test suite,
whereas previously it took 125 seconds.
Not sure why - other lisps do not seem to be affected.
commit be0490a52b07153228dd19f5bb8145b035f1b188
Author: Rupert Swarbrick <rswarbrick at gmail.com>
Date: Fri Sep 27 00:48:56 2013 +0100
Get rid of errrjfflag