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ID Category Severity Reproducibility Date Submitted Last Update
0000442 [ALGLIB] Linear algebra feature have not tried 2012-01-29 13:54 2012-02-15 10:22
Reporter SergeyB View Status public  
Assigned To
Priority normal Resolution open  
Status new   Product Version
Summary 0000442: Efficiently handle zero elements during triangular/orthogonal factorization
Description Dense Level 2 LU/QR/... performance on sparse matrices stored in the dense form can be significantly improved.

The idea is to skip rows of rank-1 updates which have zero coefficients. It can be done with just one "if", its cost is insignificant, and it can have major performance consequences on some types of the matrices.
Additional Information
Programming language Unspecified
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- Issue History
Date Modified Username Field Change
2012-01-29 13:54 SergeyB New Issue
2012-01-29 13:54 SergeyB Programming language => Unspecified
2012-02-15 10:22 SergeyB Target Version 3.6.0 => Near future


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