From 6e6657e2f0a89cf5cc97bc6c85f57f2df71239db Mon Sep 17 00:00:00 2001
From: conrad <conrad@localhost.localdomain>
Date: Sun, 30 Jun 2024 13:05:02 +1000
Subject: [PATCH] skip aliasing checks where not necessary

---
 include/armadillo_bits/subview_meat.hpp | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/include/armadillo_bits/subview_meat.hpp b/include/armadillo_bits/subview_meat.hpp
index b990b01d..44014046 100644
--- a/include/armadillo_bits/subview_meat.hpp
+++ b/include/armadillo_bits/subview_meat.hpp
@@ -3361,11 +3361,22 @@ template<typename eT>
 template<typename T1>
 inline
 void
-subview_col<eT>::operator=(const Base<eT,T1>& X)
+subview_col<eT>::operator=(const Base<eT,T1>& expr)
   {
   arma_debug_sigprint();
   
-  subview<eT>::operator=(X);
+  if( (is_Mat<T1>::value || is_Mat<typename Proxy<T1>::stored_type>::value) && (Proxy<T1>::has_subview == false) && (quasi_unwrap<T1>::has_subview == false) )
+    {
+    const quasi_unwrap<T1> U(expr.get_ref());
+    
+    arma_conform_assert_same_size(subview<eT>::n_rows, uword(1), U.M.n_rows, U.M.n_cols, "copy into submatrix");
+    
+    arrayops::copy(const_cast<eT*>(colmem), U.M.memptr(), subview<eT>::n_rows);
+    }
+  else
+    {
+    subview<eT>::operator=(expr);
+    }
   }