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Thu May 28 14:46:56 CEST 2015 · https://mail.python.org/pipermail/python-dev/2015-May/140240.html

> On May 28, 2015, at 1:54 AM, Berker Peksağ <berker.peksag at gmail.com> wrote:
> 
> * Performance improvements are not bug fixes

Practicality beats purity here.   
Recognize that a huge number of Python users will remain in the Python2.7 world
for some time.  We have a responsibility to the bulk of our users (my estimate is
that adoption rate for Python 3 is under 2%).  The computed goto patch makes
substantial performance improvements.  It is callous to deny the improvement
to 2.7 users.

> * The patch doesn't make the migration process from Python 2 to Python 3 easier

Sorry, that is a red-herring (an orthogonal issue).
If you care about 2-to-3 migration, then start
opposing proposals for API changes that increase
the semantic difference between 2 and 3.

Raymond

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[Python-Dev] Computed Goto dispatch for Python 2