Fast and Small C++ - When Efficiency Matters
Talkat CppCon 2024 · on Tuesday, 2024-09-17· at 14:00· Adams A, 6700 North Gaylord Rockies Boulevard·
summary
Shows how empty-base/CompressedPair tricks shrink a unique_ptr with a compile-time deleter to pointer size, demonstrates EBO + C++20 no_unique_address and C++23 static lambdas saving instructions, measures SSO tradeoffs across implementations (libstdc++ 7‑byte SSO, libc++ 15‑byte, Facebook 23‑byte) and counts bytes, uses constexpr to eliminate runtime copies and ROM→RAM init, highlights C++ Insights to inspect layouts, and explains the C++26 backing-array wording that lets compilers make initializer_list arrays static.
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chapters (7)
- 0:00Introduction
- 2:58Unique pointer and compressed pair
- 14:46Small string optimization
- 32:03Small string buffer capacity
- 36:46Facebook's string and const expressions
- 44:10C++26 initializer lists
- 53:36Summary
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