> C++ doesn't zero-initialize instances before calling the constructor. This is exactly the reason why we use C++ for high performance applications: we don't p

> C++ doesn't zero-initialize instances before calling the constructor. This is exactly the reason why we use C++ for high performance applications: we don't pay for features we don't need. On one commercial product I worked on [1], we found out that zero-initialization of 3D vectors was consuming around 5% of the total running time on some scenes. [1] The CPU kernel of iray: http://www.nvidia.com/object/nvidia-iray.html http://www.nvidia.com/object/nvidia-iray.html