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double-array trie

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Sohu Tech Products
Sohu Tech Products
Jun 24, 2026 · Backend Development

How to Build an Efficient Text Content Moderation System

This article details the design and implementation of a high‑performance text content moderation system, covering the end‑to‑end workflow, the core Aho‑Corasick multi‑pattern matching algorithm, its double‑array Trie optimization, memory and speed benchmarks, and practical deployment considerations for large‑scale news client platforms.

Aho-Corasickalgorithm optimizationbackend
0 likes · 18 min read
How to Build an Efficient Text Content Moderation System
JavaGuide
JavaGuide
Apr 7, 2026 · Information Security

Why Brute‑Force Won’t Cut It for Sensitive‑Word Filtering (And What Actually Works)

The article walks through the evolution of sensitive‑word filtering—from naïve brute‑force scanning to Trie, Aho‑Corasick automaton, Double‑Array Trie, and DFA implementations—detailing their algorithms, time/space complexities, concrete Java code examples, performance trade‑offs, high‑concurrency optimizations, and practical production advice for building a robust content‑moderation system.

Aho-CorasickDFAPerformance Optimization
0 likes · 26 min read
Why Brute‑Force Won’t Cut It for Sensitive‑Word Filtering (And What Actually Works)