Comment 8 for bug 1592749

I didn't look too closely at the extra debug output yet, so can't be sure it'll help, but my thought was simply to compare it to my run and see if anything stands out, if any specific part takes much longer in one run, etc.
Also note I haven't run the tests with Postgres to compare, but doubt my system would be 10x faster than yours.
I didn't see any difference between 5.5/5.6/5.7 either, though with running times from 17-24 seconds that's a bit uncertain.