To make it a "fair" fight, I converted the Go and C++ versions to trace
"Rust" instead. These are my results on my Macbook Pro:

=== RUST ===
$ rustc -O bin.rs
$ time ./bin > rrays.ppm

real 0m14.472s
user 0m14.102s
sys 0m0.365s

=== GO ===
$ go build main.go
$ time ./main > grays.ppm

real 0m13.928s
user 0m13.914s
sys 0m0.020s

=== C++ ===
$ gcc -O crays.cpp
$ time ./a.out > crays.ppm

real 0m10.800s
user 0m10.794s
sys 0m0.005s

=== RANKINGS ===
1) C++ : 10.8s
2) Go   : 13.9s
3) Rust : 14.5s


On Tue, Sep 24, 2013 at 1:59 PM, Geoffrey Irving <irv...@naml.us> wrote:

> It seems like rust would perform better in this benchmark against
> languages like Erlang and Haskell, which have even longer names.
>
> Geoffrey
>
> On Sep 24, 2013, at 10:08 AM, John Mija <jon...@proinbox.com> wrote:
>
> > Summary: Rustc 17.7s, Go 13.6s, Clang 11.2s, GCC 10.4s.
> >
> > Note that the versions in Clang, G++ and Go are rendering the word "Go"
> while that the Rust version is rendering a word bigger "Rust"
> >
> > System: x86_64 GNU/Linux 3.8.0-30-generic
> >    Intel(R) Core(TM) i3-2100 CPU @ 3.10GHz
> >    4 GB RAM
> >
> > I've used Rust trunk, Go 1.1.2:
> >
> > $ gcc --version
> > gcc (Ubuntu/Linaro 4.7.3-1ubuntu1) 4.7.3
> >
> > $ clang --version
> > Ubuntu clang version 3.2-1~exp9ubuntu1 (tags/RELEASE_32/final) (based on
> LLVM 3.2)
> > Target: x86_64-pc-linux-gnu
> > Thread model: posix
> >
> > $ go version
> > go version go1.1.2 linux/amd64
> >
> > $ rust --version
> > rust 0.8 (b6fe27c 2013-09-24 07:06:09 -0700)
> > host: x86_64-unknown-linux-gnu
> >
> > * * *
> >
> > $ rustc --opt-level=3 raytracer.rs -o rayt-rust
> > $ time ./rayt-rust > rayt-rust.ppm
> >
> > real  0m17.746s
> > user  0m17.332s
> > sys   0m0.404s
> >
> > $ go tool 6g raytracer.go && go tool 6l -o rayt-go raytracer.6 && rm
> raytracer.6
> >
> > $ time ./rayt-go > rayt-go.ppm
> >
> > real  0m13.664s
> > user  0m13.656s
> > sys   0m0.008s
> >
> > $ clang -O3 -lm raytracer.cpp -o rayt-clang
> > $ time ./rayt-clang > rayt-clang.ppm
> >
> > real  0m11.199s
> > user  0m11.188s
> > sys   0m0.004s
> >
> > $ g++ -O3 -lm raytracer.cpp -o rayt-g++
> > $ time ./rayt-g++ > rayt-g++.ppm
> >
> > real  0m10.411s
> > user  0m10.404s
> > sys   0m0.000s
> >
> >
> > El 24/09/13 14:52, Huon Wilson escribió:
> >> On 24/09/13 16:18, John Mija wrote:
> >>> Since a post in HN about a raytracer into a business card, a guy built
> >>> the implementation in Go:
> >>>
> >>> https://groups.google.com/forum/#!topic/golang-nuts/mxYzHQSV3rw
> >>>
> >>> The C++ version: https://gist.github.com/kid0m4n/6680629
> >>> The Go version: https://github.com/kid0m4n/gorays
> >>>
> >>> Performance (2.2 Ghz Quad Core (2675QM), 16 GB RAM, OX 10.9, Go 1.1.2):
> >>>
> >>> C++ version: 11.803 s
> >>> Go version: 28.883 s
> >>>
> >>> * * *
> >>> It would be interesting if somebody with experience in Rust could
> >>> build the version in Rust to compare the speed.
> >>> _______________________________________________
> >>> Rust-dev mailing list
> >>> Rust-dev@mozilla.org
> >>> https://mail.mozilla.org/listinfo/rust-dev
> >>
> >> I bit: https://github.com/huonw/card-trace
> >>
> >> Summary: Clang 13.8s, GCC 17.9s, Rustc 17.9s.
> >>
> >> (1.9GHz 3517U, 8 GB, linux. GCC: 4.8.1, Clang: 3.3, rustc: 18e3bcd
> >> 2013-09-23 23:46:05 -0700.)
> >>
> >> I just did essentially a transliteration of the C++ into (reasonably
> >> idiomatic) Rust, I imagine one could make it faster with some effort,
> >> but that would be cheating (at least, it would then become a test of
> >> *my* micro-optimisation ability, rather than that of the compilers). It
> >> appears that clang vectorises/uses SSE directly more eagerly than either
> >> gcc or rustc from some quick poking with perf.
> >>
> >> (I don't have Go on this computer to compare; although I imagine the
> >> only comparison of interest would be with gccgo, since "normal" go
> >> doesn't optimise anywhere near as much as LLVM does.)
> >>
> >> Huon
> >> _______________________________________________
> >> Rust-dev mailing list
> >> Rust-dev@mozilla.org
> >> https://mail.mozilla.org/listinfo/rust-dev
> >>
> >>
> > _______________________________________________
> > Rust-dev mailing list
> > Rust-dev@mozilla.org
> > https://mail.mozilla.org/listinfo/rust-dev
>
>
> _______________________________________________
> Rust-dev mailing list
> Rust-dev@mozilla.org
> https://mail.mozilla.org/listinfo/rust-dev
>
>
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