Hi, Ángel de Vicente <angel.vicente.garr...@gmail.com> writes: > Now I have two more questions, to see if I can get better performance: >
> 1) I'm just running the Julia distribuation that came with my Ubuntu > distro. I don't know how this was compiled. Is there a way to see > which optimization level and which compiler options were used when > compiling Julia? Would I be able to get better performance out of > Julia if I do my own compilation from source? (either using a high > optimization flag or perhaps even using another compiler (I have > access to the Intel compilers suite here). regarding this, I downloaded Julia source and I compiled it with the default makefiles (gfortran and optimization -O3 as far as I can see), and there was no important time difference. I tried to compile with Intel compilers by creating the Make.user file with the following content ,---- | USEICC=1 | USEIFC=1 | USE_INTEL_LIBM=1 `---- but it failed, with the following error: ,---- | Making all in src | /usr/include/c++/4.8/string(38): catastrophic error: cannot open source | file "bits/c++config.h" | #include <bits/c++config.h> | ^ | | compilation aborted for patchelf.cc (code 4) `---- Any hints on getting it compiled with the Intel compilers? > 2) Is it possible to give optimization flags somehow to the JIT > compiler? In this case I know that the main_loop function is crucial, > and it is going to be executed hundreds/thousands of times, so I > wouldn't mind spending more time the first time it is compiled if it > can be optimized as much as possible. I looked around the Julia documentation, but saw nothing, so perhaps this is not possible at all? Thanks, -- Ángel de Vicente http://www.iac.es/galeria/angelv/
