NFAs are cheaper to construct, but have a O(n*m) matching time, where n is the size of the input and m is the size of the state graph. NFAs are often seen as the reasonable middle ground, but i disagree and will argue that NFAs are worse than the other two. they are theoretically “linear”, but in practice they do not perform as well as DFAs (in the average case they are also much slower than backtracking). they spend the complexity in the wrong place - why would i want matching to be slow?! that’s where most of the time is spent. the problem is that m can be arbitrarily large, and putting a large constant of let’s say 1000 on top of n will make matching 1000x slower. just not acceptable for real workloads, the benchmarks speak for themselves here.
11:49, 6 марта 2026Из жизни
。体育直播对此有专业解读
More on this storyShepperton Studios to support Surrey businesses
“‘非对称作战’是无奈之举。伊朗与美国、以色列不接壤，且空军装备老旧，无人机与弹道导弹，成了伊朗唯一可靠的远程反击手段。”肖宁分析，近年来，伊朗大力发展无人机与导弹技术，在技术水平和武器库存上都有基础。相比于需要巨额投入、体系复杂的现代化海空军，导弹与无人机门槛更低、见效更快，威慑更直接。
No refund policy