From 80e54a93d07d11f62974276bc114649da3be4c52 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Atgeirr=20Fl=C3=B8=20Rasmussen?= <atgeirr@sintef.no>
Date: Mon, 27 Aug 2012 13:17:27 +0200
Subject: [PATCH] Switch loop ordering for better cache performance.

---
 opm/core/utility/miscUtilitiesBlackoil.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/opm/core/utility/miscUtilitiesBlackoil.cpp b/opm/core/utility/miscUtilitiesBlackoil.cpp
index 74eb1c9c..6f4f7556 100644
--- a/opm/core/utility/miscUtilitiesBlackoil.cpp
+++ b/opm/core/utility/miscUtilitiesBlackoil.cpp
@@ -243,8 +243,8 @@ namespace Opm
         // matrix data.
         std::fill(surfacevol, surfacevol + n*np, 0.0);
         for (int i = 0; i < n; ++i) {
-            for (int row = 0; row < np; ++row) {
-                for (int col = 0; col < np; ++col) {
+            for (int col = 0; col < np; ++col) {
+                for (int row = 0; row < np; ++row) {
                     surfacevol[i*np + row] += A[i*np*np + row + col*np] * saturation[i*np + col];
                 }
             }