Bug 89971 [Viewers] Viewers that use IViewerLabelProvider do too many instanceof checks
M6 Checking our viewer the calls to buildLabel are doing too many instanceof checks. As a result certain viewers (such as the table viewer) are twice as slow as they were in 3.0 due to these checks. I have written some performance suites to test the Table, Tree, List and Combo viewers. Table and Tree have this issue.
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/TableViewer.java
associate(children[i], item);
				}
			} else {
				
				
				
				
				
				
				item.setText(""); 
				item.setImage(new Image[Math.max(1,table.getColumnCount())]);
				disassociate(item);
			}
		}
		
		if (min < items.length) {
			for (int i = items.length; --i >= min;) {
				
				disassociate(items[i]);
			}
			table.remove(min, items.length - 1);
		}
		
		
		if (table.getItemCount() == 0) {
			table.removeAll();
		}