no Sub::Uplevel

[tobyink]

This feature restores the built-in caller() function. It needs to be used with care, but can speed up code that uses Sub::Uplevel early on but doesn't need it later.

[dagolden]

Thanks for taking a cut at writing this. My first reaction is that I think it's brittle. Sub::Uplevel is already something that is pretty crazy and this makes it even crazier. I'd rather see an XS implementation of the "normal" caller override instead to regain the speed when upleveling isn't in effect.

[dagolden]

As I said, I think trying to reverse a global override is not a great idea. I'm going to close this request.