Bug 181061 [Viewers] JFace viewers performance issues in 3.3
A number of the JFace performance tests are red since I20060926-0800.
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/ColumnViewer.java
setupEditingSupport(columnIndex, viewer);
		}
		if (viewer.getEditingSupport() == null && getCellModifier() != null) {
			setupEditingSupport(columnIndex, viewer);
		}
		return viewer;
	}
	/**
	 * Sets up editing support for the given column based on the "old" cell
	 * editor API.
	 * 
	 * @param columnIndex
	 * @param viewer
	 */
	private void setupEditingSupport(final int columnIndex, ViewerColumn viewer) {
		if (getCellModifier() != null) {
			viewer.setEditingSupport(new EditingSupport(this) {
				/*
				 * (non-Javadoc)
				 * 
				 * @see org.eclipse.jface.viewers.EditingSupport#canEdit(java.lang.Object)
				 */
				public boolean canEdit(Object element) {
					return getCellModifier().canModify(element,
							(String) getColumnProperties()[columnIndex]);
				}
				/*
				 * (non-Javadoc)
				 * 
				 * @see org.eclipse.jface.viewers.EditingSupport#getCellEditor(java.lang.Object)