I'm curious how to cleanly override CVs that are written in XS? More specifically, for example, we have: use Time::HiRes; and want to *Time::HiRes::gettimeofday = sub() { 42 } Fine up to this point, it works, but what if I want to restore the original XS method back? Saving and restoring glob contents doesn't work: 
my $x = *Time::HiRes::gettimeofday;
... change ...
*Time::HiRes::gettimeofday = $x;

[download]
and local *Time::HiRes::gettimeofday = sub {} is not acceptable, I'd like the change to persist after I quit the lexical scope. So, the question: how do I restore an overridden XS method?

In reply to restore overridden XS methods by dk

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