Obviously keep in mind the various caveats that come with benchmarks, but it seems that Swift is at least capable of achieving C-like performance[1] <i>in some circumstances</i>.<p>[1]: <a href="https:&#x2F;&#x2F;benchmarksgame.alioth.debian.org&#x2F;u64q&#x2F;compare.php?lang=swift&amp;lang2=gcc" rel="nofollow">https:&#x2F;&#x2F;benchmarksgame.alioth.debian.org&#x2F;u64q&#x2F;compare.php?la...</a>