abseil uses STLStringResizeUninitialized() in many string functions. However, STLStringResizeUninitialized() is only implemented on libc++ string that has __resize_default_init(). libstdc++ users will get the slower string->resize() speed. Can abseil support this for libstdc++?
derekmauro
commented
2 years ago
abseil uses STLStringResizeUninitialized() in many string functions. However, STLStringResizeUninitialized() is only implemented on libc++ string that has __resize_default_init(). libstdc++ users will get the slower string->resize() speed. Can abseil support this for libstdc++?
https://github.com/abseil/abseil-cpp/blob/b1b63f7aa8467ff5c2fc81231f6ec69fe93ca3b0/absl/strings/internal/resize_uninitialized.h#L41
folly supports uninitialized resize on libc++, libstdc++ and msvc. https://github.com/facebook/folly/blob/main/folly/memory/UninitializedMemoryHacks.h