so then you do that, making stuff on the heap, doing extra zero'ing and so on, and your debug build gets faster, and you call it good. then someone profiles a r

so then you do that, making stuff on the heap, doing extra zero'ing and so on, and your debug build gets faster, and you call it good. then someone profiles a release build, removes the allocation and watches the optimizer wipe out the entire copy because all you were really doing is touching a single field. there's no general case here.