almost every regex engine today descends from one of two approaches: Thompson’s NFA construction (1968) or backtracking (1994). Thompson-style engines (grep, RE2, Rust’s regex) give you linear-time guarantees but only support the “standard” fragment - | and *. backtracking engines (the rest, 95% chance the one you’re using) give you a mix of advanced features like backreferences, lookarounds.., but are unreliable, and can blow up to exponential time on adversarial inputs, which is a real security concern known as ReDoS. to be more precise, this exponential behavior is not the only problem with backtracking engines - they also handle the OR (|) operator much slower, but let’s try to start with the big picture.
在液冷服务器、高效电源模块等关键节能技术上，中国产业界已达到全球并跑水平，青海、内蒙古等地的实践表明，中国在“算电协同”的工程化落地方面已探索出可行路径。。51吃瓜对此有专业解读
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Крупнейшая нефтяная компания мира задумалась об альтернативе для морских перевозок нефти14:56