Performance Tune-Up

[retailcoder]

Parsing a whole project and walking the tree is expensive, and it shows. Let's do something about it.

• Parallelize comment parsing (i.e. parse modules in parallel), and run asynchronously.
• Implement a TreeViewListener: VisualBasic6Listener class that returns a System.Windows.Forms.TreeNode object instead of an INode; generating the tree nodes as the ANTLR tree walker traverses the parse tree will be much faster than walking the parse tree once to generate INode objects, and then walking the INode objects to generate TreeNode objects.

[retailcoder]

Implemented the TreeViewListener (didn't bother with icons) - the Code Explorer isn't noticeably faster... but this:

var qualifiedName = new QualifiedModuleName(project.Name, component.Name);
var moduleNode = _parser.Parse(component).ParseTree.GetContexts<TreeViewListener, TreeNode>(new TreeViewListener(qualifiedName));
moduleNodes.AddRange(moduleNode);

Replaces this:

            var moduleNode = new TreeNode(component.Name);
            moduleNode.NodeFont = font;
            moduleNode.ImageKey = GetComponentImageKey(component.Type);
            moduleNode.SelectedImageKey = moduleNode.ImageKey;

            var qualifiedModuleName = new Inspections.QualifiedModuleName(project.Name, component.Name);
            moduleNode.Tag = new QualifiedSelection(qualifiedModuleName, Selection.Empty);

            var parserNode = _parser.Parse(project.Name, component.Name, component.CodeModule.Lines());

            AddNodes<OptionNode>(moduleNode, parserNode, qualifiedModuleName, CreateOptionNode);
            AddNodes<EnumNode>(moduleNode, parserNode, qualifiedModuleName, CreateEnumNode);
            AddNodes<TypeNode>(moduleNode, parserNode, qualifiedModuleName, CreateTypeNode);
            AddNodes<ConstDeclarationNode>(moduleNode, parserNode, qualifiedModuleName, CreateDeclaredIdentifierNode);
            AddNodes<VariableDeclarationNode>(moduleNode, parserNode, qualifiedModuleName, CreateDeclaredIdentifierNode);
            AddNodes<ProcedureNode>(moduleNode, parserNode, qualifiedModuleName, CreateProcedureNode);

            moduleNodes.Add(moduleNode);