Meituan Technology Team

Feb 25, 2021 · Mobile Development

How Precompiled Headers and Clang Modules Boost iOS Build Performance

This article explains the inner workings of #import, precompiled headers (PCH), header maps (hmap), Clang modules, and Swift‑Objective‑C interop, showing how they affect compilation speed, robustness, and scalability in large iOS projects and offering practical optimization techniques.