diff --git a/common/gal/opengl/opengl_gal.cpp b/common/gal/opengl/opengl_gal.cpp
index e830c38b06..c7a6a5f495 100644
--- a/common/gal/opengl/opengl_gal.cpp
+++ b/common/gal/opengl/opengl_gal.cpp
@@ -294,6 +294,7 @@ void OPENGL_GAL::DrawCircle( const VECTOR2D& aCenterPoint, double aRadius )
 {
     if( isFillEnabled )
     {
+        currentManager->Reserve( 3 );
         currentManager->Color( fillColor.r, fillColor.g, fillColor.b, fillColor.a );
 
         /* Draw a triangle that contains the circle, then shade it leaving only the circle.
@@ -320,6 +321,7 @@ void OPENGL_GAL::DrawCircle( const VECTOR2D& aCenterPoint, double aRadius )
 
     if( isStrokeEnabled )
     {
+        currentManager->Reserve( 3 );
         currentManager->Color( strokeColor.r, strokeColor.g, strokeColor.b, strokeColor.a );
 
         /* Draw a triangle that contains the circle, then shade it leaving only the circle.
@@ -394,6 +396,7 @@ void OPENGL_GAL::DrawArc( const VECTOR2D& aCenterPoint, double aRadius, double a
         // Triangle fan
         for( alpha = aStartAngle; ( alpha + alphaIncrement ) < aEndAngle; )
         {
+            currentManager->Reserve( 3 );
             currentManager->Vertex( 0.0, 0.0, 0.0 );
             currentManager->Vertex( cos( alpha ) * aRadius, sin( alpha ) * aRadius, 0.0 );
             alpha += alphaIncrement;
@@ -402,6 +405,8 @@ void OPENGL_GAL::DrawArc( const VECTOR2D& aCenterPoint, double aRadius, double a
 
         // The last missing triangle
         const VECTOR2D endPoint( cos( aEndAngle ) * aRadius, sin( aEndAngle ) * aRadius );
+
+        currentManager->Reserve( 3 );
         currentManager->Vertex( 0.0, 0.0, 0.0 );
         currentManager->Vertex( cos( alpha ) * aRadius, sin( alpha ) * aRadius, 0.0 );
         currentManager->Vertex( endPoint.x,    endPoint.y,     0.0 );
@@ -434,6 +439,7 @@ void OPENGL_GAL::DrawRectangle( const VECTOR2D& aStartPoint, const VECTOR2D& aEn
     // Fill the rectangle
     if( isFillEnabled )
     {
+        currentManager->Reserve( 6 );
         currentManager->Shader( SHADER_NONE );
         currentManager->Color( fillColor.r, fillColor.g, fillColor.b, fillColor.a );
 
@@ -868,6 +874,8 @@ void OPENGL_GAL::drawLineQuad( const VECTOR2D& aStartPoint, const VECTOR2D& aEnd
     glm::vec4 vector = currentManager->GetTransformation() *
                        glm::vec4( -startEndVector.y * scale, startEndVector.x * scale, 0.0, 0.0 );
 
+    currentManager->Reserve( 6 );
+
     // Line width is maintained by the vertex shader
     currentManager->Shader( SHADER_LINE, vector.x, vector.y, lineWidth );
     currentManager->Vertex( aStartPoint.x, aStartPoint.y, layerDepth );    // v0
@@ -909,6 +917,8 @@ void OPENGL_GAL::drawFilledSemiCircle( const VECTOR2D& aCenterPoint, double aRad
                                        double aAngle )
 {
     Save();
+
+    currentManager->Reserve( 3 );
     currentManager->Translate( aCenterPoint.x, aCenterPoint.y, 0.0f );
     currentManager->Rotate( aAngle, 0.0f, 0.0f, 1.0f );
 
@@ -940,6 +950,8 @@ void OPENGL_GAL::drawStrokedSemiCircle( const VECTOR2D& aCenterPoint, double aRa
     double outerRadius = aRadius + ( lineWidth / 2 );
 
     Save();
+
+    currentManager->Reserve( 3 );
     currentManager->Translate( aCenterPoint.x, aCenterPoint.y, 0.0f );
     currentManager->Rotate( aAngle, 0.0f, 0.0f, 1.0f );
 
diff --git a/common/gal/opengl/vertex_manager.cpp b/common/gal/opengl/vertex_manager.cpp
index d055b52169..4f65608ff9 100644
--- a/common/gal/opengl/vertex_manager.cpp
+++ b/common/gal/opengl/vertex_manager.cpp
@@ -1,7 +1,7 @@
 /*
  * This program source code file is part of KiCad, a free EDA CAD application.
  *
- * Copyright (C) 2013 CERN
+ * Copyright (C) 2013-2016 CERN
  * @author Maciej Suminski <maciej.suminski@cern.ch>
  *
  * This program is free software; you can redistribute it and/or
@@ -38,7 +38,7 @@
 using namespace KIGFX;
 
 VERTEX_MANAGER::VERTEX_MANAGER( bool aCached ) :
-    m_noTransform( true ), m_transform( 1.0f )
+    m_noTransform( true ), m_transform( 1.0f ), m_reserved( NULL ), m_reservedSpace( 0 )
 {
     m_container.reset( VERTEX_CONTAINER::MakeContainer( aCached ) );
     m_gpu.reset( GPU_MANAGER::MakeManager( m_container.get() ) );
@@ -49,13 +49,50 @@ VERTEX_MANAGER::VERTEX_MANAGER( bool aCached ) :
 }
 
 
-void VERTEX_MANAGER::Vertex( GLfloat aX, GLfloat aY, GLfloat aZ ) const
+void VERTEX_MANAGER::Reserve( unsigned int aSize )
+{
+    assert( m_reservedSpace == 0 && m_reserved == NULL );
+
+    // flag to avoid hanging by calling DisplayError too many times:
+    static bool show_err = true;
+
+    m_reserved = m_container->Allocate( aSize );
+
+    if( m_reserved == NULL )
+    {
+        if( show_err )
+        {
+            DisplayError( NULL, wxT( "VERTEX_MANAGER::Reserve: Vertex allocation error" ) );
+            show_err = false;
+        }
+
+        return;
+    }
+
+    m_reservedSpace = aSize;
+}
+
+
+void VERTEX_MANAGER::Vertex( GLfloat aX, GLfloat aY, GLfloat aZ )
 {
     // flag to avoid hanging by calling DisplayError too many times:
     static bool show_err = true;
 
     // Obtain the pointer to the vertex in the currently used container
-    VERTEX* newVertex = m_container->Allocate( 1 );
+    VERTEX* newVertex;
+
+    if( m_reservedSpace > 0 )
+    {
+        newVertex = m_reserved++;
+        --m_reservedSpace;
+
+        if( m_reservedSpace == 0 )
+            m_reserved = NULL;
+    }
+    else
+    {
+        newVertex = m_container->Allocate( 1 );
+    }
 
     if( newVertex == NULL )
     {
@@ -72,7 +109,7 @@ void VERTEX_MANAGER::Vertex( GLfloat aX, GLfloat aY, GLfloat aZ ) const
 }
 
 
-void VERTEX_MANAGER::Vertices( const VERTEX aVertices[], unsigned int aSize ) const
+void VERTEX_MANAGER::Vertices( const VERTEX aVertices[], unsigned int aSize )
 {
     // flag to avoid hanging by calling DisplayError too many times:
     static bool show_err = true;
diff --git a/include/gal/opengl/vertex_manager.h b/include/gal/opengl/vertex_manager.h
index fe6c5e6433..c7455aecea 100644
--- a/include/gal/opengl/vertex_manager.h
+++ b/include/gal/opengl/vertex_manager.h
@@ -1,7 +1,7 @@
 /*
  * This program source code file is part of KiCad, a free EDA CAD application.
  *
- * Copyright (C) 2013 CERN
+ * Copyright (C) 2013-2016 CERN
  * @author Maciej Suminski <maciej.suminski@cern.ch>
  *
  * This program is free software; you can redistribute it and/or
@@ -58,6 +58,14 @@ public:
      */
     VERTEX_MANAGER( bool aCached );
 
+    /**
+     * Function Reserve()
+     * allocates space for vertices, so it will be used with subsequent Vertex() calls.
+     *
+     * @param aSize is the number of vertices that should be available in the reserved space.
+     */
+    void Reserve( unsigned int aSize );
+
     /**
      * Function Vertex()
      * adds a vertex with the given coordinates to the currently set item. Color & shader
@@ -67,7 +75,7 @@ public:
      *
      * @param aVertex contains vertex coordinates.
      */
-    inline void Vertex( const VERTEX& aVertex ) const
+    inline void Vertex( const VERTEX& aVertex )
     {
         Vertex( aVertex.x, aVertex.y, aVertex.z );
     }
@@ -81,7 +89,7 @@ public:
      * @param aY is the Y coordinate of the new vertex.
      * @param aZ is the Z coordinate of the new vertex.
      */
-    void Vertex( GLfloat aX, GLfloat aY, GLfloat aZ ) const;
+    void Vertex( GLfloat aX, GLfloat aY, GLfloat aZ );
 
     /**
      * Function Vertices()
@@ -94,7 +102,7 @@ public:
      * @param aVertices contains vertices to be added
      * @param aSize is the number of vertices to be added.
      */
-    void Vertices( const VERTEX aVertices[], unsigned int aSize ) const;
+    void Vertices( const VERTEX aVertices[], unsigned int aSize );
 
     /**
      * Function Color()
@@ -340,6 +348,12 @@ protected:
     GLubyte                 m_color[ColorStride];
     /// Currently used shader and its parameters
     GLfloat                 m_shader[ShaderStride];
+
+    /// Currently reserved chunk to store vertices
+    VERTEX*                 m_reserved;
+
+    /// Currently available reserved space
+    unsigned int            m_reservedSpace;
 };
 
 } // namespace KIGFX