This article walks through a production‑grade Go local cache implementation, covering TTL and LRU fundamentals, sharded concurrency, singleflight protection, asynchronous refresh, capacity control, persistence, performance testing, and real‑world usage scenarios.
singleflight, a Go concurrency primitive from the x/sync package, merges duplicate in‑flight requests to reduce server load, with detailed usage examples, source code analysis, and discussion of its differences from sync.Once and typical application scenarios such as cache‑penetration, remote calls, and task deduplication.
This article explores a bug in an enhanced singleflight event‑merging system, illustrates problematic scenarios with overlapping events, and presents a time‑stamp based compensation mechanism that detects and re‑pushes inconsistent data to ensure correct final event states.
This article explains the Go singleflight package, its original implementation, and a custom WriteGroup enhancement that merges concurrent read and write events to dramatically improve registration center performance under high load.
This article examines how the mic‑queue list in a live‑streaming app caused heavy server load due to three‑second polling, and details a systematic performance‑optimization process—including analysis, reducing I/O, employing Go’s singleflight caching, and switching JSON libraries—to cut resource usage by up to 60% while preserving user experience.
