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 Post subject: Slow sparse solver
PostPosted: Sun Nov 22, 2020 3:32 am 
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Joined: Sun Nov 22, 2020 3:16 am
Posts: 1
Hello,

I am solving a sparse linear system Ku = B using alglib::sparsesolve in C++, the matrix is around 1e4x1e4 in size and 99.9% empty. However the computation time on my personal computer is around 1 minute, which looks very high for such matrix (I am running in sequential with commercial version of Alglib, the matrix is in CSR format). I was wondering if this computation time was normal or if I misunderstood something.

Code:
    alglib::sparsematrix K;
    alglib::real_1d_array B;

    ......

    int nLen = B.length()
    alglib::real_1d_array u;
    u.setlength(nLen);

    alglib::sparsesolverreport rep;
    alglib::sparsesolve(K,nLen,B,u,rep);


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