From a5ebdbe87e2c7f21e10a0db66022e6ca0f9ad1c5 Mon Sep 17 00:00:00 2001
From: eap <eap@opencascade.com>
Date: Wed, 11 Apr 2018 14:19:02 +0300
Subject: [PATCH] 0023544: SMESH's performance issues

---
 src/SMDS/SMDS_ElementFactory.hxx | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/SMDS/SMDS_ElementFactory.hxx b/src/SMDS/SMDS_ElementFactory.hxx
index b25b635c8..3dbc1ab17 100644
--- a/src/SMDS/SMDS_ElementFactory.hxx
+++ b/src/SMDS/SMDS_ElementFactory.hxx
@@ -266,8 +266,13 @@ struct _RangeSet
    */
   attr_t SetValue( int theIndex, attr_t theValue )
   {
-    set_iterator rNext = mySet.upper_bound( theIndex );
+    set_iterator rNext = mySet.end(); // case of adding elements
     set_iterator     r = rNext - 1;
+    if ( r->my1st > theIndex )
+    {
+      rNext = mySet.upper_bound( theIndex );
+      r     = rNext - 1;
+    }
     int          rSize = Size( r ); // range size
     attr_t      rValue = r->myValue;
     if ( rValue == theValue )
-- 
2.30.2