I was curious what a "detected a super-linear match" means and asked Duck-AI. Explanation below. (LLMs are good in condensing knowledge as long as you review the output like I did. see also https://stackoverflow.com/questions/12841970/how-can-i-recognize-an-evil-regex)

<Reveal this spoiler or all in this thread>

Basically its trying to detect that the complexity is more ("super") than linear and turns on caching.

Since the situation from starting from "c" without prior match is the same like with a prior "b" or "ab" the cached result of a FAIL can be used to shortcut the search when starting from "c", "d" and so on.

Of course you could also apply the same mechanism with recursive regexes, but as I said the use cases are rare.

Cheers

- LanX (LogIn timing out again)

In reply to Re^4: Recursive sub-pattern spectacularly slow, what's wrong? (me, or just this use case, or a bug?) by LanX
in thread Recursive sub-pattern spectacularly slow, what's wrong? (me, or just this use case, or a bug?) by Anonymous Monk

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