<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On Tue, Jan 28, 2014 at 1:36 PM, David Liu <span dir="ltr"><<a href="mailto:daveliu@mit.edu" target="_blank">daveliu@mit.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">Hi, I'm writing an application that solves a sparse matrix many times using Pastix. I notice that the first solves takes a very long time, while the subsequent solves are very fast. I don't fully understand what's going on behind the curtains, but I'm guessing it's because the very first solve has to read in the non-zero structure for the LU factorization, while the subsequent solves are faster because the nonzero structure doesn't change.<div>
<br></div><div>My question is, is there any way to save the information obtained from the very first solve, so that the next time I run the application, the very first solve can be fast too (provided that I still have the same nonzero structure)?</div>
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</blockquote></div><br>No, we do not persist the factored matrices.</div><div class="gmail_extra"><br></div><div class="gmail_extra"> Matt<br clear="all"><div><br></div>-- <br>What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.<br>
-- Norbert Wiener
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