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From Ted Dunning <>
Subject Re: Making Very Large-Scale Linear Algebraic Computations Possible Via Randomization
Date Tue, 29 Sep 2009 21:32:11 GMT
Probably better to save it.  Probably also depends on the problem set.  If A
has fewer non-zero elements, then recomputing y may be faster than
retrieving a saved copy.  Even if y and A have the same number of of
non-zero elements, then recomputing y might be faster because you save the
writing cost.

But I really don't know which way this should go in the end.

On Mon, Sep 28, 2009 at 11:49 PM, Jake Mannix <> wrote:

> This is true, but is recomputing Y on the second pass worth not saving it?

Ted Dunning, CTO

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