You think Rust (or any of them) is slow ? Try raytracing by hand. :)
On Tue, Sep 24, 2013 at 5:20 PM, Kevin Ballard <ke...@sb.org> wrote: > I ran them myself. Incidentally, the Rust version is absurdly slow if I > don't specify an optimization level. Here's what I got: > > Clang (-O3): 7.99s real > Go (improved version): 9.68s real > Go (original version): 16.73s real > Rust (--opt-level=3): 13.03s real > > (I ran each case 3 times and took the median) > > So if we discard the algorithmically-improved Go, then we get > > 1) C++: 7.99s > 2) Rust: 13.02s > 3) Go: 16.73s > > I'm curious as to what difference using gccgo would make, but I didn't try > (as I don't have GCC). > > -Kevin > > On Sep 24, 2013, at 2:48 PM, Huon Wilson <dbau...@gmail.com> wrote: > > On 25/09/13 04:13, Tim Kuehn wrote: > > 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 > > > > This surprises me a lot (the fact that Go is (1) faster than Rust, (2) > it's only 20% slower than C++, compared to 150+% originally), so I > investigated, and found that the Go is "cheating" with an algorithmic > improvement: > https://github.com/kid0m4n/gorays/commit/249f229ba8c769c38d7dc018acfdf29cc86d6e43 > > If it's possible, could we re-run the benchmarks with the commit before > that? > > 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 > > -- -Thad Thad on Freebase.com <http://www.freebase.com/view/en/thad_guidry> Thad on LinkedIn <http://www.linkedin.com/in/thadguidry/>
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