1. 11
  1. 3

    The buried lede: Rust’s std::borrow::Cow is faster than the old C++ copy-on-write string class because it doesn’t require atomic ops.

    1. 2

      Fascinating, I had no idea that implementing copy-on-write has such different performance characteristics in C++ and Rust. A very nuanced essay, too – it skilfully mixes quantitative and deductive reasoning, and highlights simultaneous truths rather than forcing false choices or rankings.