fix performance issue
fix performance issue

sankhesh/VTK,sankhesh/VTK,mspark93/VTK,demarle/VTK,msmolens/VTK,keithroe/vtkoptix,SimVascular/VTK,SimVascular/VTK,sumedhasingla/VTK,ashray/VTK-EVM,sumedhasingla/VTK,sankhesh/VTK,jmerkow/VTK,msmolens/VTK,SimVascular/VTK,gram526/VTK,candy7393/VTK,sankhesh/VTK,ashray/VTK-EVM,jmerkow/VTK,candy7393/VTK,ashray/VTK-EVM,hendradarwin/VTK,jmerkow/VTK,keithroe/vtkoptix,demarle/VTK,msmolens/VTK,johnkit/vtk-dev,mspark93/VTK,hendradarwin/VTK,berendkleinhaneveld/VTK,candy7393/VTK,berendkleinhaneveld/VTK,sumedhasingla/VTK,keithroe/vtkoptix,candy7393/VTK,mspark93/VTK,hendradarwin/VTK,ashray/VTK-EVM,msmolens/VTK,keithroe/vtkoptix,sankhesh/VTK,msmolens/VTK,johnkit/vtk-dev,jmerkow/VTK,ashray/VTK-EVM,demarle/VTK,demarle/VTK,keithroe/vtkoptix,candy7393/VTK,gram526/VTK,gram526/VTK,ashray/VTK-EVM,sumedhasingla/VTK,ashray/VTK-EVM,jmerkow/VTK,mspark93/VTK,jmerkow/VTK,candy7393/VTK,SimVascular/VTK,keithroe/vtkoptix,SimVascular/VTK,gram526/VTK,demarle/VTK,demarle/VTK,msmolens/VTK,msmolens/VTK,mspark93/VTK,sumedhasingla/VTK,demarle/VTK,johnkit/vtk-dev,sankhesh/VTK,hendradarwin/VTK,jmerkow/VTK,keithroe/vtkoptix,berendkleinhaneveld/VTK,mspark93/VTK,gram526/VTK,johnkit/vtk-dev,sankhesh/VTK,SimVascular/VTK,hendradarwin/VTK,candy7393/VTK,demarle/VTK,jmerkow/VTK,keithroe/vtkoptix,ashray/VTK-EVM,sumedhasingla/VTK,hendradarwin/VTK,berendkleinhaneveld/VTK,berendkleinhaneveld/VTK,sankhesh/VTK,hendradarwin/VTK,sumedhasingla/VTK,mspark93/VTK,berendkleinhaneveld/VTK,sumedhasingla/VTK,gram526/VTK,berendkleinhaneveld/VTK,johnkit/vtk-dev,msmolens/VTK,SimVascular/VTK,johnkit/vtk-dev,gram526/VTK,mspark93/VTK,SimVascular/VTK,candy7393/VTK,gram526/VTK,johnkit/vtk-dev