← Wednesday, September 30, 2026Performance & OSGuide
Aho-Corasick builds multi-pattern matching from tries and suffix links
The explanation shows how a trie and suffix links support simultaneous substring matching, with links preserving the longest suffix that is also a pattern prefix. The construction is useful background for engineers working with search and text-processing systems.
- What
- Aho-Corasick builds an automaton to match multiple substrings while scanning an input sequence.
- How
- It adds suffix links to a trie; on a failed transition, the matcher follows those links to preserve a usable suffix and continue scanning.
- Why it matters
- The approach lets engineers match many patterns in one scan rather than searching separately for each pattern.
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