What is the difference between the vendor and Netlib version of ScaLAPACK and which should I use?
The publically available version of ScaLAPACK (on netlib) is designed to be portable and efficient across a wide range of computers. It is not hand-tuned for a specific computer architecture. The vendor-specific versions of ScaLAPACK have been optimized for a specific architecture. Therefore, for best performance, we recommend using a vendor-optimized version of ScaLAPACK if it is available. However, as new ScaLAPACK routines are introduced with each release, the vendor-specific versions of ScaLAPACK may only contain a subset of the existing routines. If a user suspects an error in a vendor-specific ScaLAPACK routine, he is recommended to download the ScaLAPACK Test Suite from netlib.
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