[Python-Dev] draft pep: backwards compatibility

[Collin Winter]

On Thu, Jun 18, 2009 at 7:17 PM, Benjamin Peterson<benjamin at python.org> wrote:
[snip]
> Backwards Compatibility Rules
> =============================
>
> This policy applys to all public APIs.  These include the C-API, the standard
> library, and the core language including syntax and operation as defined by the
> reference manual.
>
> This is the basic policy for backwards compatibility:
>
> * The behavior of an API *must* not change between any two consecutive releases.

Is this intended to include performance changes? Clearly no-one will
complain if things simply get faster, but I'm thinking about cases
where, say, a function runs in half the time but uses double the
memory (or vice versa).

Collin