4 ms·

In most of these benchmarks [1] Swift's performance comes pretty close to that of Rust. So yeah, I would call that very fast. [1] https://web.archive.org/web/

• raphlinus 7y ago
  Try some JSON benchmarks with Codables in Swift vs serde in Rust. Rust smokes Swift, something like 20x. Incidentally I've spent considerable effort on this problem, including writing a prototype faster JSON parser in Swift (still about 3x slower than Rust, but a huge speedup over what's there). I couldn't get anyone in the Swift community to care enough to motivate me to finish the work, which is indicative of a deeper problem: Swift just doesn't have "performance culture," the benchmark game results notwithstanding.
• mpweiher 7y ago
  Hmm...when I look at those numbers, Swift only comes close in a very few, is significantly slower in most (50%-4x) and much slower in one (45x): fannkuch / pidgins: essentially the same binary-trees / fasta / Mandelbrot: ~ 1.5x slower spectral-norm / reverse-complement: >= 2x slower k-nucleotide / n-body: ~4x slower regex-redux: 45x slower