Change algorithm for symmetric tridiagonal problems to PWK instead of MRRR when all values are calculated. #9602
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… MRRR when all values are calculated.
andreasnoack
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Jan 5, 2015
Change algorithm for symmetric tridiagonal problems to PWK instead of MRRR when all values are calculated.
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Is the performance gain worth backporting? |
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It is about 36 pct. faster for independent gaussian elements, so it might be a good idea. |
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Backported. |
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@ViralBShah helps keeping track of things if you cross-link the commits, by doing |
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Thanks. I will do this from now on. |
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Because it is faster and no less precise.