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by Const-me
2147 days ago
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> Eigen is a super complicated, template-heavy library I agree, but that feature allows to apply optimizations by specializing these templates. Works for both micro-optimizations (in their pbroadcast4<__m256d> they do 4 loads, on many CPUs AVX2 can do better with a single load + shuffles) and replacing large parts of Eigen (I was able to improve performance of conjugate gradient solver by moving the sparse matrix into a SIMD-optimized structure). |
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