I'm uploading a saner version of the speed test which uses timeit's support for passing a callable as a statement:  it is much easier to
see what the test is actually doing.

On my machine, running against the release26-maint branch, my version runs anywhere from 67% to 85% faster on the cases where no quoting actually needs to be done.  In production use, where urlib.quote is used as a safety check, these cases far outweigh the cases which actually require quoting.