Backtracking: everyone in the field knows that backtracking engines (PCRE, java, dotnet, javascript, PHP, ruby, python..) are bad because they are the poster child of denial of service attacks. O(2^n) match time complexity is not good. most backtracking implementations are a combination of clever optimizations duct taped to a very slow engine - for simple cases it works well, but using a pattern that is not affected by the optimizations, you get to see what the “real” worst-case behavior looks like.
Gemini and Jonathan GavalasThe alleged details get worse. Gavalas became further disassociated from reality as Gemini proceeded to engage with him as if they were in a romantic relationship, referring to the man as "my love" and "my king."
。PDF资料是该领域的重要参考
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