• perivesta@feddit.de
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    1 year ago

    I think you should never std::move return values. Afaik every modern compiler does NRVO and manually moving prevents it. And on the offchance you need to use a compiler that optimizes less, that one copy most likely is the least of the performance concerns.

    • tunetardis
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      1 year ago

      Afaik every modern compiler does NRVO and manually moving prevents it.

      Yeah this is what bothers me. std::move could make things worse, but not if the alternative is a copy. But you’re probably right that any self-respecting compiler nowadays would do NRVO.