Hi Dean, On Wed, Oct 20, 2010 at 14:39, Dean Michael Berris <[email protected]> wrote: >> >> >> I'm unconvinced that COW strings can be depended on as a central >> library feature- a quick Google seems to indicate otherwise. >> >> http://bit.ly/hiqqU >> http://bit.ly/cqpKVN >> > > cpp-netlib doesn't depend on COW, but most implementations do > implement std::string with COW optimizations. This means, GNU's > libstdc++ has a COW string, Dinkumware (now Microsoft's STL) > implements it as well. Worrying about copies only matters if it's > really affecting the performance of the application.
Microsoft's STL as of VS2008 doesn't use COW, it uses the small-string optimization. Not sure if they went (back?) to COW in 2010, but I doubt it. LLVM has an interesting sub-project implementing a standard library from scratch, and one of the decisions they mention in the overview is using small string optimization over COW, as if it was a plain truth; http://libcxx.llvm.org/. So, I think there's merit to not expecting COW from std::string. - Kim ------------------------------------------------------------------------------ Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev _______________________________________________ Cpp-netlib-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/cpp-netlib-devel
