ITPUB

Dec 31, 2021 · Cloud Native

How We Slashed Istio xDS Latency from Minutes to Seconds at Scale

This article details the challenges Ctrip faced with Istio control‑plane performance at massive scale and explains the systematic methodology, concrete optimizations—including O(n²) to O(n) patching, Merkle‑tree based success‑rate metrics, and startup improvements—that reduced xDS push latency from minutes to seconds while enhancing reliability.