but there’s a problem with the classical formulation. the derivative takes a regex and a character, so to build a state machine you need to compute it for every possible character to get all transitions from a given state. sure, you can compress the number of characters into equivalence classes before, but you still have to compute for each equivalence class - and many of them end up leading to the same state anyway. for example, the regex abc (below) cares about a, b, c, and “everything else”, which brings us down from 65536 to 4 in UTF-16, but for the first node (abc) even b and c behave the same as “everything else”. so what are we computing these for? in other words, there is something left to improve here.
Alcoholic Beverages per Month
On-chip memory management。PG官网对此有专业解读
Automatic route promotion (discover → verify → promote to default) is designed but not yet fully implemented.
，这一点在谷歌中也有详细论述
有論點認為，巴拿馬政府的決定是中美角力下自保的做法。，更多细节参见官网
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