From 48db4062b58b65024b65158c50add45f4218d60d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Atgeirr=20Fl=C3=B8=20Rasmussen?= <atgeirr@sintef.no>
Date: Fri, 23 Nov 2018 21:37:52 +0100
Subject: [PATCH] Count lower/upper entries simpler and faster.

---
 opm/autodiff/ParallelOverlappingILU0.hpp | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/opm/autodiff/ParallelOverlappingILU0.hpp b/opm/autodiff/ParallelOverlappingILU0.hpp
index ce44781b5..9b63dbba4 100644
--- a/opm/autodiff/ParallelOverlappingILU0.hpp
+++ b/opm/autodiff/ParallelOverlappingILU0.hpp
@@ -446,14 +446,14 @@ namespace Opm
         size_type numLower = 0;
         size_type numUpper = 0;
         const auto endi = A.end();
-        for (auto i=A.begin(); i!=endi; ++i) {
+        for (auto i = A.begin(); i != endi; ++i) {
           const size_type iIndex = i.index();
+          size_type numLowerRow = 0;
           for (auto j = (*i).begin(); j.index() < iIndex; ++j) {
-              ++numLower;
-          }
-          for (auto j = (*i).beforeEnd(); j.index() > iIndex; --j) {
-              ++numUpper;
+              ++numLowerRow;
           }
+          numLower += numLowerRow;
+          numUpper += (*i).size() - numLowerRow - 1;
         }
         assert(numLower + numUpper + A.N() == A.nonzeroes());