1 files changed, 85 insertions, 0 deletions
diff --git a/src/com/vaadin/tests/PerformanceTestSubTreeCaching.java b/src/com/vaadin/tests/PerformanceTestSubTreeCaching.java
new file mode 100644
index 0000000000..aeec8176d8
--- /dev/null
+++ b/src/com/vaadin/tests/PerformanceTestSubTreeCaching.java
@@ -0,0 +1,85 @@
+/* 
+@ITMillApache2LicenseForJavaFiles@
+ */
+
+package com.vaadin.tests;
+
+import java.util.Date;
+
+import com.vaadin.ui.Button;
+import com.vaadin.ui.CustomComponent;
+import com.vaadin.ui.Label;
+import com.vaadin.ui.OrderedLayout;
+import com.vaadin.ui.Table;
+
+public class PerformanceTestSubTreeCaching extends CustomComponent {
+
+    private final OrderedLayout main;
+
+    private final OrderedLayout testContainer;
+
+    private Date startTime;
+
+    private final Label result;
+
+    private static final String DESCRIPTION = "Hyphothesis: Toolkit 4 has major architechtural problem when adding "
+            + "small incrementall updates to a container which has either a lot or "
+            + "some very slow components in it. Toolkit 5 has 'subtree caching' and a"
+            + " small amount of logic in containers, so CommunicationManager can assure"
+            + " that client do not need information about unchanged components it contains."
+            + " Completing test ought to be much faster with Toolkit 5.";
+
+    private static final int INITIAL_COMPONENTS = 40;
+
+    public PerformanceTestSubTreeCaching() {
+        main = new OrderedLayout();
+        setCompositionRoot(main);
+        addInfo();
+
+        Button b = new Button("start test", this, "startTest");
+        b
+                .setDescription("Push this button to start test. A test label will be rendered above existing components.");
+        main.addComponent(b);
+        b = new Button("end test", this, "endTest");
+        b
+                .setDescription("Push this button as soon as test componenet is rendered.");
+        main.addComponent(b);
+
+        result = new Label();
+        main.addComponent(result);
+
+        testContainer = new OrderedLayout();
+        populateContainer(testContainer, INITIAL_COMPONENTS);
+        main.addComponent(testContainer);
+    }
+
+    public void startTest() {
+        startTime = new Date();
+        testContainer.addComponentAsFirst(new Label("Simplel Test Component"));
+    }
+
+    public void endTest() {
+        final long millis = (new Date()).getTime() - startTime.getTime();
+        final Float f = new Float(millis / 1000.0);
+        result.setValue("Test completed in " + f + " seconds");
+    }
+
+    /**
+     * Adds n Table components to given container
+     * 
+     * @param testContainer2
+     */
+    private void populateContainer(OrderedLayout container, int n) {
+        for (int i = 0; i < n; i++) {
+            // array_type array_element = [i];
+            final Table t = TestForTablesInitialColumnWidthLogicRendering
+                    .getTestTable(5, 100);
+            container.addComponent(t);
+        }
+    }
+
+    private void addInfo() {
+        main.addComponent(new Label(DESCRIPTION, Label.CONTENT_XHTML));
+    }
+
+}