C library for linear algebra

Please, give me some tips for a HIGH PERFORMANCE C library for linear algebra (matrix algebra, eigenvalues, eigenvectors etc.). Can be both open-source or closed-source.


  • CLAPACK (f2c'ed version of LAPACK)
  • GSL - GNU Scientific Library
  • EDIT Thanks to comments from osgx:

  • CLAPACK is the library which uder the hood uses very high-performance BLAS library, as do other libraries, like ATLAS.
  • GSL is a standalone C library, not as fast as any based on BLAS. However its performance is still quite good (not extremely good though) and is used quite often; mostly because of its portability.
  • I know both LAPACK and GSL and I can recommend both of them. LAPACK is very low-level library and GSL may be more comfortable to use, but speaking of good performance -- BLAS-based library it is.


    ATLAS, maybe?

    Edit: if you're open to C++, you should definitely check Eigen, it's a very neat library, and pretty fast too, according to the benchmarks.


    Again if you are actually looking/open for modern C++ code, Armadillo is getting really hyped/popular. Also see their own benchmarking against IT++ and Newmat .

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