how is this possible when RE# is doing more work - two passes instead of one? it comes down to cache behavior. Aho-Corasick builds the full automaton upfront - for 2663 words that's a large DFA with many states and unpredictable jumps between them, leading to cache misses and branch mispredictions. rust regex uses a single lazily-compiled DFA, which helps, but the state space for a large alternation is still substantial. RE#'s derivative-based DFAs are lazily built and more compact - the two automata (forward and reverse) each have far fewer states than the equivalent full trie or NFA-based DFA, so transitions hit warm cache lines more often.
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r.cpio: ASCII cpio 归档文件（SVR4 无 CRC）