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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 2018-01-02 17:22
Reporter SergeyB View Status public  
Assigned To SergeyB
Priority normal Resolution open Platform
Status assigned   OS
Projection none   OS Version
ETA none Fixed in Version Product Version
  Target Version Next 'LinAlg' release Product Build
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.
Steps To Reproduce
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
2018-01-02 17:17 SergeyB Target Version Near future => Next 'LinAlg' release
2018-01-02 17:22 SergeyB Status new => assigned
2018-01-02 17:22 SergeyB Assigned To => SergeyB

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