(You caught me inbetween edits. code is corrected.)
The execution time is undesirable, but also it is an array of 118 thousand elements, which perl does not store efficiently. Even if I store them as one string, then Perl can't index into it efficiently.
I could cache it as a series of codepoint spans, like [ [ 0x65 => 0x90 ], ... ] and build these ahead of time, but I feel like there should be some way to query this right out of perl's internal data structures. And someone must have wanted to do that before? and probably wrote a module for it?
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