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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 | |||||||||
Status | assigned | 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. |
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Additional Information | ||||||||||||
Programming language | Unspecified | |||||||||||
Attached Files | ||||||||||||
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