Re: performance bug of `wc -m`

[Eric Fischer]

I should also add that the core reason that wc is slow and Python is fast
is not that UTF-8 decoding in wc is slow, it is that the Python code is
just counting characters, while wc is also maintaining a line width
for --max-line-length. It doesn't really need to do this, and probably
shouldn't do this, unless --max-line-length is specified.

Eric