[issue9203] Use computed gotos by default

[Antoine Pitrou]

Antoine Pitrou <pitrou at free.fr> added the comment:

> No, but we do need to make sure that the casual user does not
> run into such issues by using the default compiler on a typical
> Unix system with Python default settings.

The point is that we cannot make it sure. There is nothing specific
about computed gotos here: any kind of compiler bug could threaten
Python performance without us being able to do anything about it. Even
if we restrict ourselves to standard C features.

(also, I'll point out that it's not demonstrated that the problem above
affects Python, rather than simply the particular piece of code shown in
the bugzilla report)

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<http://bugs.python.org/issue9203>
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