[SciPy-user] Getting the right numerical libraries for scipy

[Stéfan van der Walt]

2009/4/2 William K. Coulter <wcoulter at berkeley.edu>:
>
> I wanted to optimize my python code to use the scipy.sparse library;
> however, benchmarking reveals that multiplying a sparse and dense matrix
> takes over 100 times as long as multiplying the equivalent two dense
> matrices.

I did some benchmarks now (see attached), and I see the same behaviour:

http://mentat.za.net/refer/bench_sparse.png

This seems odd.

Regards
Stéfan
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