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/ViewerRow.java
int index = getColumnIndex(point);
		return getCell(index);
	}
	/**
	 * Get the columnIndex of the point.
	 * 
	 * @param point
	 * @return int or -1 if it cannot be found.
	 */
	public int getColumnIndex(Point point) {
		int count = getColumnCount();
		
		if (count == 0) {
			return 0;
		}
		for (int i = 0; i < count; i++) {
			if (getBounds(i).contains(point)) {
				return i;
			}
		}
		return -1;
	}
	/**
	 * Get a ViewerCell for the column at index.
	 * 
	 * @param column
	 * @return {@link ViewerCell} or <code>null</code> if the index is
	 *         negative.
	 */
	public ViewerCell getCell(int column) {