Lazy DFAs (2010) are a clever optimization to mitigate the O(2^m) blowup of DFA construction, by only constructing the states that you actually visit. lazy DFAs reduce the theoretical automata construction time to either O(2^m) or O(n), whichever is lower. you could argue that it’s theoretically no longer linear time, since you could have a regex that creates a new state for every character in the input, but in practice you will keep revisiting the same states. for all intents and purposes it behaves more like O(n) with some initial wind-up time. the main downside of lazy DFAs is that they are more complex to implement, and you have to ship a compiler as part of your regex algorithm. i want to highlight Rust regex and RE2 as excellent implementations of this approach, which you can also see in the benchmarks.
2026-03-03 00:00:00:03014311410http://paper.people.com.cn/rmrb/pc/content/202603/03/content_30143114.htmlhttp://paper.people.com.cn/rmrb/pad/content/202603/03/content_30143114.html11921 国务院关于修改和废止部分行政法规的决定
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刚刚，苹果新iPhone来了，3999元用上最新A19，内存翻倍不涨价
We, the undersigned organizations representing civil society, nonprofit institutions, and technology companies, write to express our strong opposition to Google’s announced policy requiring all Android app developers to register centrally with Google themselves in order to distribute applications outside of the Google Play Store, set to take effect worldwide in the coming months.
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Популярность красной икры в России объяснили08:48，这一点在体育直播中也有详细论述