Ubuntu中具有虚拟样式的TableViewer很慢

Question

在Eclipse RCP应用程序中，在Ubuntu 12.04 LTS上，我使用带有两列和TableViewer样式的VIRTUAL来显示大量数据（Records appox.500000）。

在Windows上，此数据加载速度非常快，而在Ubuntu上则需要更多时间。以下是代码 -

    tvEq = new TableViewer(group_1, SWT.BORDER | SWT.FULL_SELECTION|SWT.VIRTUAL);
    table = tvE.getTable();
    table.setLinesVisible(true);
    table.setHeaderVisible(true);
    GridData gd_table = new GridData(SWT.FILL, SWT.FILL, true, true, 1, 1);
    gd_table.heightHint = 359;
    table.setLayoutData(gd_table);

    TableViewerColumn tableViewerColumn = new TableViewerColumn(tvE, SWT.NONE,0);
    TableColumn tblclmn1 = tableViewerColumn.getColumn();
    tblclmn1.setWidth(260);

    tblclmn1.setText("Column1 ");

    TableViewerColumn tableViewerColumn_1 = new TableViewerColumn(tvEq, SWT.NONE,1);
    TableColumn tblclmn2 = tableViewerColumn_1.getColumn();
    tblclmn2.setWidth(300);
    tblclmn2.setText("Column 2");

           tvEq.setUseHashlookup(true);
    tvE.setContentProvider(new EContProv(tvE));     
    tvE.setLabelProvider(new EResultLP());            List<ECategory>eq=cvJs.getCombo().getItem(cvJs.getCombo().getSelectionIndex());
    tvE.setInput(eq);
    tvE.setItemCount(eq.size());



         public class EContProv implements ILazyContentProvider {
    private TableViewer viewer;
    private List<ECategory> elements;
    public EContProv(TableViewer viewer) {
        this.viewer = viewer;
    }
    public void dispose() {

    }
    @SuppressWarnings("unchecked")
    public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
        this.elements = (List<ECategory>) newInput;
    }
    public void updateElement(int index) {
        viewer.replace(elements.get(index), index);

    }
}


  public class EQResultLP implements       TableLabelProvider,ITableColorProvider,ITableFontProvider {

Color backColor=new Color(Display.getCurrent(),230,255,230);
Font backFont=new Font(Display.getCurrent(),"Tahoma",11, SWT.BOLD);
Font fontP=new Font(Display.getCurrent(),"Tahoma",11, SWT.NORMAL);

@Override
public void addListener(ILabelProviderListener listener) {
    // TODO Auto-generated method stub

}

@Override
public void dispose() {
    backColor.dispose();
    backFont.dispose();     
    fontP.dispose();

}

@Override
public boolean isLabelProperty(Object element, String property) {
    // TODO Auto-generated method stub
    return false;
}

@Override
public void removeListener(ILabelProviderListener listener) {
    // TODO Auto-generated method stub

}

@Override
public Font getFont(Object element, int columnIndex) {
    ECategory cat=(ECategory)element;   
    if(columnIndex==0 && !cat.getColumn1().trim().equals("")){
        return backFont;
    }
    return fontP;
}

@Override
public Color getForeground(Object element, int columnIndex) {
    // TODO Auto-generated method stub
    return null;
}

@Override
public Color getBackground(Object element, int columnIndex) {       
    ECategory cat=(ECategory)element;   
    if(columnIndex==0 && !cat.getColumn1().trim().equals("")){
        return backColor;
    }
    return null;

}

@Override
public Image getColumnImage(Object element, int columnIndex) {
    ECategory cat=(ECategory)element;   
    if(columnIndex==0 && !cat.getColumn1().trim().equals("")){
        return null;
    }
    if(columnIndex==1 && !cat.getColumn2().trim().equals("")){
        return null;
    }
    return null;
}

@Override
public String getColumnText(Object element, int columnIndex) {
    ECategory cat=(ECategory)element;
if(columnIndex==0){
    return cat.getColumn1();
}
if(columnIndex==1){
    return cat.getColumn2();
}
    return null;
}
}

请帮帮我......