Stefan Monnier <monnier@iro.umontreal.ca> schrieb am Mo., 1. Mai 2017 um
15:01 Uhr:

> > Replacing a primitive value with a struct containing such a value
> > should never degrade performance; that would be a compiler bug.
>
> FWIW, No, compilers do not guarantee that semantically-equivalent
> programs will be compiled to code with equivalent performance, so it
> wouldn't be a bug.  It's only a "quality of implementation" issue.
>

Yes, I mean "bug" in a wider sense that includes QoI issues.