[issue17515] Add sys.setasthook() to allow to use a custom AST optimizer

[Brett Cannon]

Brett Cannon added the comment:

And that's fine as it allows for more explicit control over what gets optimized. Basically if there is a global hook directly into the compiler there needs to be more control over detecting it's being optimized, what to do about .pyo files, etc. At least at the loader level it's much more modular and controlled as to what will and will not get the optimizations.

So if you want to pursue this I think there needs to be more thought than just a global sys hook for this sort of thing.

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