Re^2: Convert string to array - performance challenge

There is a problem with using unpack '(A)*':

[0] Perl> $buf = "abcdef\x00ghik";;
[0] Perl> @a = unpack '(A)*', $buf;;
[0] Perl> print length for @a;;
1
1
1
1
1
1
0
1
1
1
1
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