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Facts: On average rust is 10% slower on the banchmarkgame: https://benchmarksgame-team.pages.debian.net/benchmarksgame/fastest/gpp-rust.html https://benchmarksg

Facts: On average rust is 10% slower on the banchmarkgame: https://benchmarksgame-team.pages.debian.net/benchmarksgame/fastest/gpp-rust.html https://benchmarksgame-team.pages.debian.net/benchmarksgame/... But they use llvm instead of gcc for c++, and gcc is in average 20% faster than clang. Therefore, rust is 30% slower, at least on heavily optimised programs. And hyper is not the fastest http server, but the actix one is one of the fastest yes.

steveklabnik 7y ago
> Facts: On average rust is 10% slower on the banchmarkgame That does not show it's 10% slower on average; it shows that C++ is 0.9917938291x as fast as Rust. They both have some where they win by 30%, most are closer, Rust is just faster on average. > But they use llvm instead of gcc for c++, C++ g++ g++ (Ubuntu 9.2.1-9ubuntu2) 9.2.1 20191008 ? > gcc is in average 20% faster than clang. Extremely citation needed.
- igouy 7y ago
  > faster on average What kind-of time measurements? What kind-of average? This chart shows some time measurements: https://benchmarksgame-team.pages.debian.net/benchmarksgame/which-programs-are-fastest.html https://benchmarksgame-team.pages.debian.net/benchmarksgame/... :and the geometric mean is faster for the C++ programs, but the median seems faster for the rust programs. Statistical artifacts?
  - steveklabnik 7y ago
    > What kind-of time measurements? What kind-of average? I interpreted the parent to mean a simple average, so I did exactly that: calculated the percentage for each, and averaged them. In the colloquial term, "mean".
    - The_rationalist 7y ago
      Geometric mean is the implicit default measurement for benchmarking
    - igouy 7y ago
      typo ? "the colloquial term" is "average", the specific term is "mean".
igouy 7y ago
> On average rust is 10% slower on the banchmarkgame If that claim was true … > gcc is in average 20% faster than clang and if that claim was true … then we might guess the rust programs average could be 10% faster than the C++ programs average, if both used the same compiler backend — because those rust programs were compiled with llvm but those c++ programs were compiled with gcc.

steveklabnik 7y ago

> Facts: On average rust is 10% slower on the banchmarkgame That does not show it's 10% slower on average; it shows that C++ is 0.9917938291x as fast as Rust. They both have some where they win by 30%, most are closer, Rust is just faster on average. > But they use llvm instead of gcc for c++, C++ g++ g++ (Ubuntu 9.2.1-9ubuntu2) 9.2.1 20191008 ? > gcc is in average 20% faster than clang. Extremely citation needed.

igouy 7y ago
> faster on average What kind-of time measurements? What kind-of average? This chart shows some time measurements: https://benchmarksgame-team.pages.debian.net/benchmarksgame/which-programs-are-fastest.html https://benchmarksgame-team.pages.debian.net/benchmarksgame/... :and the geometric mean is faster for the C++ programs, but the median seems faster for the rust programs. Statistical artifacts?
- steveklabnik 7y ago
  > What kind-of time measurements? What kind-of average? I interpreted the parent to mean a simple average, so I did exactly that: calculated the percentage for each, and averaged them. In the colloquial term, "mean".
  - The_rationalist 7y ago
    Geometric mean is the implicit default measurement for benchmarking
  - igouy 7y ago
    typo ? "the colloquial term" is "average", the specific term is "mean".

igouy 7y ago

> On average rust is 10% slower on the banchmarkgame If that claim was true … > gcc is in average 20% faster than clang and if that claim was true … then we might guess the rust programs average could be 10% faster than the C++ programs average, if both used the same compiler backend — because those rust programs were compiled with llvm but those c++ programs were compiled with gcc.