Copy elision - Wikipedia

In C++ computer programming, copy elision refers to a compiler optimization technique that eliminates unnecessary copying of objects. The C++ language standard generally allows implementations to perform any optimization, provided the resulting program's observable behavior is the same as if, i.e. pretending, the program were executed exactly as mandated by the standard. Beyond that, the standard

[daimatz]

RVO

[mooz]

戻り値の最適化. RVM. 戻り値のために一時オブジェクトが作成されないようにする.