ReadMeFeed / Community knowledge
Real questions. Useful conversations. Find the people who know your stack.
GCC link-time optimization lets the compiler inline functions across separate C files and remove unused code, but it trades link time and memory for smaller binaries.
Learn how to break translation unit boundaries using LLVM Link Time Optimization (LTO) to reduce binary size and improve performance through cross-module inlining.
Thin LTO gives most whole-program optimization benefits with manageable link-time cost. Enable -flto=thin -O2 on both compile and link lines, install the linker plugin, audit for latent UB, and expect 3-7% speedup on cross-file hot paths.
ThinLTO splits LLVM's whole-program optimization into a fast summary phase and parallel backend workers, avoiding the memory explosion of monolithic LTO. This post shows how to integrate it into CMake/Ninja, verify cross-TU inlining, and navigate cache, debug-info, and sanitizer trade-offs.
GCC's -flto lets the linker optimize across translation units, often shrinking release binaries at the cost of longer link times.
Learn how GCC's Link-Time Optimization lets the compiler inline functions and eliminate dead code across translation units, and see the trade‑offs in build time, binary size, and debugging.
Stop treating your C++ files as isolated islands. Learn how LLVM Link Time Optimization (LTO) and ThinLTO break the translation unit barrier to enable global inlining and faster binaries.
Learn how to use GCC's Link Time Optimization (LTO) to reduce binary size and improve performance by breaking the isolation between translation units.
Stop letting translation units limit your performance. Learn how GCC's Link Time Optimization (LTO) enables cross-module inlining and global dead code elimination to shrink binaries and boost speed.
llvm
c