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Fri Feb 20 06:09:17 CET 2009 · https://mail.python.org/pipermail/python-dev/2009-February/086252.html

On Thu, Feb 19, 2009 at 9:07 PM, Guido van Rossum <guido at python.org> wrote:
> On Thu, Feb 19, 2009 at 8:38 PM, Brett Cannon <brett at python.org> wrote:
>> On Thu, Feb 19, 2009 at 19:41, Benjamin Peterson <benjamin at python.org>
>> wrote:
>>> As we prepare to merge the io-c branch, the question has come up [1]
>>> about the original Python implementation. Should it just be deleted in
>>> favor C version? The wish to maintain the two implementations together
>>> has been raised on the basis that Python is easier to experiment on
>>> and read (for other vm implementors).
>>
>> Probably not a surprise, but +1 from me for keeping the pure Python version
>> around for the benefit of other VMs as well as a reference implementation.
>
> You have been practice channeling me again, haven't you? I like the
> idea of having two (closely matching) implementations very much.

Agreed. In particular, this helps any projects that are focused on
improving the performance of pure-Python code: they can work on
minimizing the delta between the Python and C versions.

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[Python-Dev] IO implementation: in C and Python?