Basically you're trying to defeat perl's copy-on-write optimisation. Concatting an empty string will currently do this, but there are no future guarantees. If you want your code to be robust you really need to handle this at the C level.

Dave.

In reply to Re: Concatenation with empty string -- good enough to force physical copy? by dave_the_m
in thread Concatenation with empty string -- good enough to force physical copy? by vr

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