Does Rust have an equivalent of -Ofast -march=native?





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Does Rust have an equivalent of CFLAGS="-Ofast -march=native" C gcc compiler optimizations?
                                                                                                                                                                              






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    Does Rust have an equivalent of CFLAGS="-Ofast -march=native" C gcc compiler optimizations?
                                                                                                                                                                                  






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      Does Rust have an equivalent of CFLAGS="-Ofast -march=native" C gcc compiler optimizations?
                                                                                                                                                                                    






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      Does Rust have an equivalent of CFLAGS="-Ofast -march=native" C gcc compiler optimizations?
                                                                                                                                                                                    






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      edited Nov 25 '18 at 15:44









      Shepmaster

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      asked Nov 25 '18 at 10:40









      timkofutimkofu

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          To optimise for the native CPU, you can use



          RUSTFLAGS="-C target-cpu=native"


          I think LLVM optimises for speed (or more specifically, throughput) by default; I couldn't really find documentation on this, but this is what the source code suggests.



          You should be able to select a different cost model using e.g.



          RUSTFLAGS="-C target-cpu=native -C llvm-args='-cost-kind=latency'"


          but I haven't tried this, nor do I know any details about the effect of this switch.






          share|improve this answer
























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            1 Answer
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            active

            oldest

            votes








            1 Answer
            1






            active

            oldest

            votes









            active

            oldest

            votes






            active

            oldest

            votes









            2














            To optimise for the native CPU, you can use



            RUSTFLAGS="-C target-cpu=native"


            I think LLVM optimises for speed (or more specifically, throughput) by default; I couldn't really find documentation on this, but this is what the source code suggests.



            You should be able to select a different cost model using e.g.



            RUSTFLAGS="-C target-cpu=native -C llvm-args='-cost-kind=latency'"


            but I haven't tried this, nor do I know any details about the effect of this switch.






            share|improve this answer




























              2














              To optimise for the native CPU, you can use



              RUSTFLAGS="-C target-cpu=native"


              I think LLVM optimises for speed (or more specifically, throughput) by default; I couldn't really find documentation on this, but this is what the source code suggests.



              You should be able to select a different cost model using e.g.



              RUSTFLAGS="-C target-cpu=native -C llvm-args='-cost-kind=latency'"


              but I haven't tried this, nor do I know any details about the effect of this switch.






              share|improve this answer


























                2












                2








                2







                To optimise for the native CPU, you can use



                RUSTFLAGS="-C target-cpu=native"


                I think LLVM optimises for speed (or more specifically, throughput) by default; I couldn't really find documentation on this, but this is what the source code suggests.



                You should be able to select a different cost model using e.g.



                RUSTFLAGS="-C target-cpu=native -C llvm-args='-cost-kind=latency'"


                but I haven't tried this, nor do I know any details about the effect of this switch.






                share|improve this answer













                To optimise for the native CPU, you can use



                RUSTFLAGS="-C target-cpu=native"


                I think LLVM optimises for speed (or more specifically, throughput) by default; I couldn't really find documentation on this, but this is what the source code suggests.



                You should be able to select a different cost model using e.g.



                RUSTFLAGS="-C target-cpu=native -C llvm-args='-cost-kind=latency'"


                but I haven't tried this, nor do I know any details about the effect of this switch.







                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered Nov 25 '18 at 12:37









                Sven MarnachSven Marnach

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                363k80760704
































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