This is the nbody benchmark of the Shootout site: http://shootout.alioth.debian.org/u32/performance.php?test=nbody
The faster version is a Fortran one, probably thanks to vector operations that allow a better SIMD vectorization. This is the C++ version: http://shootout.alioth.debian.org/u32/program.php?test=nbody&lang=gpp&id=1 C++ version compiled with: g++ -Ofast -fomit-frame-pointer -march=native -mfpmath=sse -msse3 --std=c++0x An input parameter is n= 3_000_000 (but use a larger number if therun time is too much small, like 10 millions or more). First D2 version (serial): http://codepad.org/AdRSm2wP Second D2 version, three times slower thanks to vector ops, more similar to the Fortran version: http://codepad.org/7O3mz9en Is someone willing to take two (or more) timings using LDC 2 compiler (I have LDC1 only, beside DMD)? I'd like to know how much time it takes to run the first D version *compared* to the C++ version :-) If you time the second D2 version too, then it's better. Bye and thank you, bearophile
