> Is it possible to cheaply canonicalize UTF-8? Or is a full parse/validation unavoidable if all you need to do is a substring search? Even if it was, it would

> Is it possible to cheaply canonicalize UTF-8? Or is a full parse/validation unavoidable if all you need to do is a substring search? Even if it was, it wouldn't help you. Implementing search over unicode text properly requires locale-awareness and cannot be done by comparing codepoint sequences, even after canonicalisation.