conformance.txt catches a wrong answer and nothing caught a slow one - a dependency swapped for a heavier one, a lookup that became a scan. Every task is timed in each round rather than one at a time, so a busy minute costs them all a round rather than making one look slow, and each keeps its fastest. Drift is under a tenth against a gate of a fifth. Change-Id: I9905999b921229fdcd49f59693fd994130e29c8a