From 7f6234517cb521e699b36cdc41dee40840a5cb3e Mon Sep 17 00:00:00 2001
From: conrad <conrad@localhost.localdomain>
Date: Fri, 30 Apr 2021 23:18:20 +1000
Subject: [PATCH] minor optimisation

---
 include/armadillo_bits/newarp_SymEigsSolver_meat.hpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/include/armadillo_bits/newarp_SymEigsSolver_meat.hpp b/include/armadillo_bits/newarp_SymEigsSolver_meat.hpp
index 6b35e7af..649a5e2e 100644
--- a/include/armadillo_bits/newarp_SymEigsSolver_meat.hpp
+++ b/include/armadillo_bits/newarp_SymEigsSolver_meat.hpp
@@ -166,7 +166,11 @@ SymEigsSolver<eT, SelectionRule, OpType>::restart(uword k)
     nnz = ncv - k + i + 1;
     Mat<eT> V(fac_V.memptr(), dim_n, nnz, false);
     Col<eT> q(Q.colptr(i), nnz, false);
-    Vs.col(i) = V * q;
+    // OLD CODE:
+    // Vs.col(i) = V * q;
+    // NEW CODE:
+    Col<eT> v(Vs.colptr(i), dim_n, false, true);
+    v = V * q;
     }
   Vs.col(k) = fac_V * Q.col(k);
   fac_V.head_cols(k + 1) = Vs;