[issue14657] Avoid two importlib copies

[Brett Cannon]

Brett Cannon <brett at python.org> added the comment:

So basically if you are running in a checkout, grab the source file and compile it manually since its location is essentially hard-coded and thus you don't need to care about sys.path and all the other stuff required to do an import, while using the frozen code for when you are running an installed module since you would otherwise need to do the search for importlib's source file to do a load at startup properly.

That's an interesting idea. How do we currently tell that the interpreter is running in a checkout? Is that exposed in any way to Python code?

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<http://bugs.python.org/issue14657>
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