wip: ....sigh..... so the diffing algorithm is robust

but it's still not finished.

We need to re-enable the fancier keyed diffing versions some point (soon!).

examples/testbed.rs

@@ -1,4 +1,10 @@
+use std::cell::Cell;
+
 use dioxus::prelude::*;
+use dioxus_core::{
+    nodes::{NodeKey, VElement, VText},
+    RealDomNode,
+};
 
 fn main() {
     env_logger::init();
@@ -13,8 +19,18 @@ p    {color: red;}
 
 const Example: FC<()> = |cx| {
     cx.render(rsx! {
-        Child { }
-        Child { }
+        Fragment {
+            Fragment {
+                Fragment {
+                    "h1"
+                }
+                "h2"
+            }
+            "h3"
+        }
+        "h4"
+        div { "h5" }
+        Child {}
     })
 };
 
@@ -26,3 +42,22 @@ const Child: FC<()> = |cx| {
         h1 {"4" }
     ))
 };
+
+// this is a bad case that hurts our subtree memoization :(
+const AbTest: FC<()> = |cx| {
+    if 1 == 2 {
+        cx.render(rsx!(
+            h1 {"1"}
+            h1 {"2"}
+            h1 {"3"}
+            h1 {"4"}
+        ))
+    } else {
+        cx.render(rsx!(
+            h1 {"1"}
+            h1 {"2"}
+            h2 {"basd"}
+            h1 {"4"}
+        ))
+    }
+};