Removed more logging statements.
While performing logging, had accidentally inserted a line that incorrectly reported holding a lock when actually was not.
Revert "Removed logging statements.  pypy does not handle -O to turn off __debug__, and so they were interfering with performance measurements.  Separate branch, log-v4 still has logging info."
Revert "Removed more logging statements."

This reverts commit aa0bd8b8eac79b6ca0ae1f52788bd8fa2e2b92ab and d4cac1cce

One branch still has all logging statements.  So can use it for profiling.