Not a major issue by any means, but OP errors when ran without any arguments. This seems to be a behaviour change from Python2 to Python3. The expected behaviour was previously to print help. ``` ~/onionperf$ onionperf Traceback (most recent call last): File "/usr/local/bin/onionperf", line 532, in <module> if __name__ == '__main__': sys.exit(main()) File "/usr/local/bin/onionperf", line 351, in main args.func(args) AttributeError: 'Namespace' object has no attribute 'func' ``` I've attached a patch to get back that behaviour. See also https://bugs.python.org/issue16308.