Performance Improvements

• Efficiency in LAPACK has been principally achieved by restructuring algorithms so that as much computation as possible is performed by calls to:

Level 3 and Level 2 BLAS

• In order to exploit the Level 3 BLAS we needed:

BLOCK-PARTITIONED ALGORITHMS

a11 a12 a13

a21 a22 a23

a31 a32 a33

A11 A12 A13

A21 A22 A23

A31 A32 A33

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