This is very interesting Michael, thanks for doing it.
I hope I'm not asking something too abvious, but could you outline how
to set up a system with the intel compiler. Is it as simple as
"install msvc", "install the intel compiler" ?

best
Oeyvind

2008/3/8, Michael Gogins <gogins@pipeline.com>:
> Here are the results of timing the Csound command rendering examples/xanadu.csd:
>
> COMPILER                              VERSION   RENDERING TIME (seconds)   BENCHMARK
>
> Intel C++ Compiler                    10.1      25.824                      76.2
> Microsoft Visual C++ Express Edition  15.0      30.169                      89.0
> MinGW                                 4.2.1     33.909                     100.O
>
> In all cases, Csound was compiled to run fast on all x86 but tuned for Core 2 Duo, without getting really finicky about individual options.
>
> This is without even attempting to use Intel's high-performance Math Kernel Library or Intel Performance Primitives to implement the vector-vector and vector-scalar arithmetic in aops.c. I think that might provide a further similar increment in performance. Intel also has a drop-in replacement for FFTW that is faster than FFTW.
>
> The Intel compiler had trouble with the big C++ file generated by SWIG for CsoundAC, so I did not compile that.
>
> On Windows, note that the Intel compiler MUST be used alongside an installation of the Microsoft compiler, but the free Express Edition of the Microsoft compiler does the job.
>
> Also note, and this is the most important thing, some high-end optimizations are missing from the Microsoft compiler's Express Edition. It is quite likely that the gap between Microsoft and Intel would narrow, or even vanish, if I had used the Professional Edition of the Microsoft compiler. Even so, Microsoft does not have anything like the Intel performance libraries.
>
> Regards,
> Mike
>
>
>
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