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# Performance Improvement

Before experimenting with different data layouts, users should make sure that they are using the fastest BLACS and BLAS libraries.

Three major factors influence the performance of a ScaLAPACK routine: the flop rate achieved by the BLAS on each node, the computational load balance, and the communication costs.

- Choosing a Faster BLACS Library
- Choosing a Faster BLAS Library
- Tuning the Distribution Parameters for Better Performance