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Fix a performance regression in (mat*mat)*vec for which mat*mat was evaluated multiple times.

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This commit is contained in:
Gael Guennebaud
2016-11-30 17:59:13 +01:00
parent ab4ef5e66e
commit c927af60ed
4 changed files with 16 additions and 9 deletions
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4
test/product_notemporary.cpp
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@@ -136,6 +136,10 @@ template<typename MatrixType> void product_notemporary(const MatrixType& m)
VERIFY_EVALUATION_COUNT( rm3.noalias() -= (cv1) * (rv1 * m1), 1 );
VERIFY_EVALUATION_COUNT( rm3.noalias() = (m1*cv1) * (rv1 * m1), 2 );
VERIFY_EVALUATION_COUNT( rm3.noalias() += (m1*cv1) * (rv1 * m1), 2 );
// Check nested products
VERIFY_EVALUATION_COUNT( cvres.noalias() = m1.adjoint() * m1 * cv1, 1 );
VERIFY_EVALUATION_COUNT( rvres.noalias() = rv1 * (m1 * m2.adjoint()), 1 );
}
void test_product_notemporary()