- use [fileinput](https://docs.python.org/3/library/fileinput.html) - apply [character mappings](https://github.com/doctaphred/emojencode/blob/master/emojencode.py#L22-L23) more efficiently (should just require a constant offset) - work with streams (none of this `''.join()` nonsense) - add more tests - document `space efficiency` (more bytes == better, right?)
''.join()nonsense)space efficiency(more bytes == better, right?)