Commit 51917d124e for perl

commit 51917d124e1c8f8162f7ccd9f379b41acbb8b685
Merge: b1e4db661a b04c5c7660
Author: David Mitchell <davem@iabyn.nospamdeletethisbit.com>
Date:   Sun Sep 27 17:47:38 2026 +0100

    [MERGE] Modernise the regex super-linear cache

    This series of commits modernises and simplifies the super-linear cache,
    makes it more theoretically correct, and makes the cache per-WHILEM node
    rather than per regex. This means that sometimes the cache can turn on
    earlier and possibly use less memory.