[Python-3000] Making more effective use of slice objects in Py3k

[Greg Ewing]

Josiah Carlson wrote:
> On the other hand, its performance characteristics could be
> confusing to users of Python who may have come to expect that "st+''" is
> a constant time operation, regardless of the length of st.

Even if that's always true, I'm not sure it's really a
useful thing to know. How often do you write a string
concatenation expecting that one of the operands will
almost always be empty? I can count the number of times
I've done that on the fingers of one elbow.

--
Greg