https://perlmaven.com/deep-recursion-on-subroutine may be more than you wanted to know, but may give some good context.

Optimising for fewest key strokes only makes sense transmitting to Pluto or beyond

In reply to Re: Unnesting deeply nested HTML elements (Deep recursion on subroutine "HTML::Element::delete") by GrandFather
in thread Unnesting deeply nested HTML elements (Deep recursion on subroutine "HTML::Element::delete") by mldvx4

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