title: Does noexcept improve performance?
body: <p>Is the <code>noexcept</code> function specifier aimed to improving the performance because of potentially no book-keeping code for exceptions in the generated object, and therefore should be added to function declarations and definitions whenever possible? I think of wrappers for callable objects in the first place, where <code>noexcept</code> could make some difference, although the checking expressions might "bloat" the source code. Is it worth?</p>