However, there is a performance regression in test-odb

Now it's about going through PY3 issues

However, StringIO really is ByteIO in most cases, and py2.7 should
run but doesn't.
This should be made work first.

More to come, especially when it's about strings

All performance tests still print to stderr, but do so in a py3 compatible way

There is more work to do though, as many imports are still incorrect.
Also, there are still print statements

autopep8 -v -j 8 --max-line-length 120 --in-place --recursive