Xiao Lou's Tech Notes

May 25, 2022 · Backend Development

Why Caching Timestamps Can Slash CPU Usage in High‑QPS Java and Go Services

This article explores how naive timestamp retrieval can become a CPU bottleneck under high concurrency, demonstrates cache‑based optimizations used in Alibaba's Cobar and Sentinel projects, presents benchmark results, and proposes an adaptive algorithm to enable or disable caching based on real‑time QPS.