Deepin Linux

Jul 25, 2026 · Fundamentals

Why System Calls Can Kill Performance and How to Cut Them

The article explains how frequent Linux system calls cause costly context switches, kernel checks, and cache/TLB invalidations, presents benchmark code that quantifies the overhead of getpid, open, read, and demonstrates batch I/O, caching, and algorithmic techniques to dramatically reduce those calls and boost high‑performance C++ network services.