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.
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Customers can pre-order the new Studio Display and Studio Display XDR starting tomorrow, March 4, at apple.com/store and in the Apple Store app in 35 countries and regions, including the U.S. They will begin arriving to customers, and will be in select Apple Store locations and Apple Authorized Resellers, starting Wednesday, March 11.。91视频是该领域的重要参考