[Python-Dev] draft pep: backwards compatibility

Collin Winter collinw at gmail.com
Sat Jun 20 19:49:59 CEST 2009

On Thu, Jun 18, 2009 at 7:17 PM, Benjamin Peterson<benjamin at python.org> wrote:
> 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).


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