diff --git a/qt5-qtbase.spec b/qt5-qtbase.spec
index c896642..c77f050 100644
--- a/qt5-qtbase.spec
+++ b/qt5-qtbase.spec
@@ -120,6 +120,7 @@ Patch69: qt5-qtbase-glibc.patch
 
 ## upstream patches
 Patch500: qtbase-everywhere-src-5.11.2-rendering-issue.patch
+Patch501: qtbase-everywhere-src-5.11.2-optimize-insertionPointsForLine.patch
 
 # Do not check any files in %%{_qt5_plugindir}/platformthemes/ for requires.
 # Those themes are there for platform integration. If the required libraries are
@@ -378,6 +379,7 @@ Qt5 libraries used for drawing widgets and OpenGL items.
 
 ## upstream patches
 %patch500 -p1 -b .rendering-issue
+%patch501 -p1 -b .optimize-insertionPointsForLine
 
 # move some bundled libs to ensure they're not accidentally used
 pushd src/3rdparty
@@ -988,6 +990,7 @@ fi
 %changelog
 * Thu Oct 25 2018 Than Ngo <than@redhat.com> - 5.11.2-3
 - backported patch to fix selection rendering issues if rounding leads to left-out pixels
+- backported patch to optimize insertionPointsForLine
 
 * Thu Oct 11 2018 Rex Dieter <rdieter@fedoraproject.org> - 5.11.2-2
 - -no-use-gold-linker (#1635973)
diff --git a/qtbase-everywhere-src-5.11.2-optimize-insertionPointsForLine.patch b/qtbase-everywhere-src-5.11.2-optimize-insertionPointsForLine.patch
new file mode 100644
index 0000000..93858f8
--- /dev/null
+++ b/qtbase-everywhere-src-5.11.2-optimize-insertionPointsForLine.patch
@@ -0,0 +1,105 @@
+diff -up qtbase-everywhere-src-5.11.2/src/gui/text/qtextengine.cpp.me qtbase-everywhere-src-5.11.2/src/gui/text/qtextengine.cpp
+--- qtbase-everywhere-src-5.11.2/src/gui/text/qtextengine.cpp.me	2018-10-25 11:30:37.371800942 +0200
++++ qtbase-everywhere-src-5.11.2/src/gui/text/qtextengine.cpp	2018-10-25 11:36:24.496953609 +0200
+@@ -3663,11 +3663,12 @@ int QTextEngine::lineNumberForTextPositi
+     return -1;
+ }
+ 
+-void QTextEngine::insertionPointsForLine(int lineNum, QVector<int> &insertionPoints)
++std::vector<int> QTextEngine::insertionPointsForLine(int lineNum)
+ {
+     QTextLineItemIterator iterator(this, lineNum);
+ 
+-    insertionPoints.reserve(iterator.line.length);
++    std::vector<int> insertionPoints;
++    insertionPoints.reserve(size_t(iterator.line.length));
+ 
+     bool lastLine = lineNum >= lines.size() - 1;
+ 
+@@ -3685,25 +3686,22 @@ void QTextEngine::insertionPointsForLine
+                 insertionPoints.push_back(i);
+         }
+     }
++    return insertionPoints;
+ }
+ 
+ int QTextEngine::endOfLine(int lineNum)
+ {
+-    QVector<int> insertionPoints;
+-    insertionPointsForLine(lineNum, insertionPoints);
+-
++    const auto insertionPoints = insertionPointsForLine(lineNum);
+     if (insertionPoints.size() > 0)
+-        return insertionPoints.constLast();
++        return insertionPoints.back();
+     return 0;
+ }
+ 
+ int QTextEngine::beginningOfLine(int lineNum)
+ {
+-    QVector<int> insertionPoints;
+-    insertionPointsForLine(lineNum, insertionPoints);
+-
++    const auto insertionPoints = insertionPointsForLine(lineNum);
+     if (insertionPoints.size() > 0)
+-        return insertionPoints.constFirst();
++        return insertionPoints.front();
+     return 0;
+ }
+ 
+@@ -3720,10 +3718,8 @@ int QTextEngine::positionAfterVisualMove
+     if (lineNum < 0)
+         return pos;
+ 
+-    QVector<int> insertionPoints;
+-    insertionPointsForLine(lineNum, insertionPoints);
+-    int i, max = insertionPoints.size();
+-    for (i = 0; i < max; i++)
++    const auto insertionPoints = insertionPointsForLine(lineNum);
++    for (size_t i = 0, max = insertionPoints.size(); i < max; ++i)
+         if (pos == insertionPoints[i]) {
+             if (moveRight) {
+                 if (i + 1 < max)
+diff -up qtbase-everywhere-src-5.11.2/src/gui/text/qtextengine_p.h.me qtbase-everywhere-src-5.11.2/src/gui/text/qtextengine_p.h
+--- qtbase-everywhere-src-5.11.2/src/gui/text/qtextengine_p.h.me	2018-10-25 11:36:39.243002574 +0200
++++ qtbase-everywhere-src-5.11.2/src/gui/text/qtextengine_p.h	2018-10-25 11:37:45.966224143 +0200
+@@ -74,6 +74,7 @@
+ #include <private/qunicodetools_p.h>
+ 
+ #include <stdlib.h>
++#include <vector>
+ 
+ QT_BEGIN_NAMESPACE
+ 
+@@ -632,7 +633,7 @@ public:
+     int nextLogicalPosition(int oldPos) const;
+     int lineNumberForTextPosition(int pos);
+     int positionAfterVisualMovement(int oldPos, QTextCursor::MoveOperation op);
+-    void insertionPointsForLine(int lineNum, QVector<int> &insertionPoints);
++    std::vector<int> insertionPointsForLine(int lineNum);
+     void resetFontEngineCache();
+ 
+     void enableDelayDecorations(bool enable = true) { delayDecorations = enable; }
+diff -up qtbase-everywhere-src-5.11.2/src/gui/text/qtextlayout.cpp.me qtbase-everywhere-src-5.11.2/src/gui/text/qtextlayout.cpp
+--- qtbase-everywhere-src-5.11.2/src/gui/text/qtextlayout.cpp.me	2018-10-25 11:38:04.426285436 +0200
++++ qtbase-everywhere-src-5.11.2/src/gui/text/qtextlayout.cpp	2018-10-25 11:40:23.919748643 +0200
+@@ -2841,9 +2841,7 @@ int QTextLine::xToCursor(qreal _x, Curso
+         bool rtl = eng->isRightToLeft();
+ 
+         eng->shapeLine(line);
+-        QVector<int> insertionPoints;
+-        if (visual && rtl)
+-            eng->insertionPointsForLine(lineNum, insertionPoints);
++        const auto insertionPoints = (visual && rtl) ? eng->insertionPointsForLine(lineNum) : std::vector<int>();
+         int nchars = 0;
+         for (int i = 0; i < nItems; ++i) {
+             int item = visualOrder[i]+firstItem;
+@@ -2975,7 +2973,7 @@ int QTextLine::xToCursor(qreal _x, Curso
+                             continue;
+                         }
+                         if (rtl && nchars > 0)
+-                            return insertionPoints[lastLine ? nchars : nchars - 1];
++                            return insertionPoints[size_t(lastLine ? nchars : nchars - 1)];
+                     }
+                     return eng->positionInLigature(&si, end, x, pos, -1,
+                                                    cpos == QTextLine::CursorOnCharacter);