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use Benchmark qw(cmpthese); ... regex 15316/s -- -43% -74% unpack 26935/s 76% -- -54% substr 58514/s 282% 117% --
my $str = "wwibblewibblewibblewibbleibblewibblewibblewibble\x{20ac}"; ... regex 14222/s -- -35% -51% unpack 21976/s 55% -- -24% substr 29020/s 104% 32% --