[SciPy-user] Fastest way to save/load fairly large (sparse) matrices

[Andrew Straw]

Dear David, this code works for me. It's not the most elegant, but at 
least you get the idea. See the test() function for the example usage.

David Warde-Farley wrote:
> Hi folks,
> 
> I've been wrestling with this problem for some time now. Essentially  
> I'm using Numpy/Scipy as the backend in a python-based web  
> application and need a way of serializing the contents of a fairly  
> large, but sparsely populated, symmetric matrix to disk. So far I've  
> experimented with just ASCII dumps and pickling, but neither really  
> has the kind of speed that I'm looking for (and is kind of necessary  
> for an interactive web application). Is there some better way?
> 
> To give you an idea of the scale, I'm hoping to get this to work with  
> 20000x20000 matrices that are about 1% full.
> 
> Thanks,
> 
> David
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