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.
My hope is that there remains a primordial spark, a glimpse of genius, to rediscover, to reconnect to - to serve not annual trends or constant phonification, but the needs of the user to use the computer as a tool to get something done.
。业内人士推荐夫子作为进阶阅读
«Европа бьет сама по себе». Страну НАТО заподозрили в организации атаки на российский газовоз. Новые подробности атаки на судно20:45
const uint32_t m = 0x5bd1e995;
Великобритания собралась защитить свою военную базу от Ирана14:46