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Sep 21, 2026 · R&D Management

AI-Driven Large-Scale Refactoring: Qunar's 70% Efficiency Boost with Harness & Loop

Qunar shares its engineering methodology for AI-driven large-scale refactoring of a 150K-line high-concurrency core system, achieving 70% efficiency gains (100PD to 30PD), 70% latency reduction, and 45% resource savings through Harness-Loop constraints, task decomposition, shadow traffic validation, and phased rollout.