On 05/24/2016 08:33 AM, jww...@mozilla.com wrote:
ForRefPtr<T> GetFoo() { RefPtr<T> foo; // ... } should we: 1. return foo and expect RVO to kick in to eliminate additional AddRef/Release 2. return foo.forget() 3. return Move(foo) Which one is preferred? ps: I find gcc is able to apply RVO even with "-O0". Not sure if it is also true for other compilers.
Can we somehow guarantee that RVO kicks in? It feels quite error prone to rely on compiler optimization when dealing with possibly slow Addref/Release calls. https://en.wikipedia.org/wiki/Return_value_optimization#Compiler_support hints that there are cases when RVO might not happen. -Olli _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
