Significant performance improvements in Intel® oneMKL PARDISO 2026.0

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Significant performance improvements in Intel® oneMKL PARDISO 2026.0

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Intel® oneMKL PARDISO 2026.0 delivers significant performance improvements for direct sparse solvers.

Key improvements:

- Reordering (Phase1): Up to 2.7x faster with improved paralllel nested dissection
- Geometric mean speedup: 1.7x across diverse matrices
- Parallel nested dissection now the default (iparm[1]=3)
- CNR mode now supports parallel version (no performance penalty for reproducible results)

- Factorization (Phase 2): Up to 12x faster
- Geometric mean speedup: 2.5x
- New optimization option (iparm[1]=43) provides up to 2.3x additional speedup for large matrices.

For more details, see this article:

https://www.intel.com/content/www/us/en/developer/articles/technical/pardiso-2026-performance-breakthrough.html

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