don't "re-get" some scopes if they don't change across frames

Author: softwareCobbler

luceedebug/src/main/java/luceedebug/coreinject/DebugManager.java

@@ -34,6 +34,7 @@
 import luceedebug.IDebugManager;
 import luceedebug.coreinject.frame.DebugFrame;
 import luceedebug.coreinject.frame.Frame;
+import luceedebug.coreinject.frame.Frame.FrameContext;
 
 public class DebugManager implements IDebugManager {
 
@@ -699,7 +700,17 @@ private DebugFrame maybe_pushCfFrame_worker(PageContext pageContext, String sour
 
         final int depth = stack.size(); // first frame is frame 0, and prior to pushing the first frame the stack is length 0; next frame is frame 1, and prior to pushing it the stack is of length 1, ...
 
-        final DebugFrame frame = DebugFrame.makeFrame(sourceFilePath, depth, valTracker, pageContext);
+        FrameContext maybeBaseFrame = stack.size() == 0
+            ? null
+            : stack.get(0) instanceof Frame ? ((Frame)stack.get(0)).getFrameContext() : null;
+
+        final DebugFrame frame = DebugFrame.makeFrame(
+            sourceFilePath,
+            depth,
+            valTracker,
+            pageContext,
+            maybeBaseFrame
+        );
 
         stack.add(frame);
 

luceedebug/src/main/java/luceedebug/coreinject/frame/DebugFrame.java

@@ -3,6 +3,7 @@
 import lucee.runtime.PageContext;
 import luceedebug.IDebugFrame;
 import luceedebug.coreinject.ValTracker;
+import luceedebug.coreinject.frame.Frame.FrameContext;
 
 /**
  * Should be a sealed class, subtypes are:
@@ -19,14 +20,14 @@ public abstract class DebugFrame implements IDebugFrame {
     // and if so, we just return some dummy frame which is guranteed to NOT schedule more work.
     static private ThreadLocal<Boolean> isPushingFrame = ThreadLocal.withInitial(() -> false);
 
-    static public DebugFrame makeFrame(String sourceFilePath, int depth, ValTracker valTracker, PageContext pageContext) {
+    static public DebugFrame makeFrame(String sourceFilePath, int depth, ValTracker valTracker, PageContext pageContext, FrameContext root) {
         if (isPushingFrame.get()) {
             return DummyFrame.get();
         }
         else {
             try {
                 isPushingFrame.set(true);
-                return new Frame(sourceFilePath, depth, valTracker, pageContext);
+                return new Frame(sourceFilePath, depth, valTracker, pageContext, root);
             }
             finally {
                 isPushingFrame.set(false);

luceedebug/src/main/java/luceedebug/coreinject/frame/Frame.java

@@ -109,16 +109,16 @@ public static class FrameContext {
         // expensive exceptions on literally every frame, e.g. if a scope is disabled by the engine and trying to touch it
         // throws an ExpressionException.
         //
-        private FrameContext(PageContext pageContext) {
+        private FrameContext(PageContext pageContext, FrameContext root) {
             this.pageContext = pageContext;
-            this.application = getScopelikeOrNull(() -> pageContext.applicationScope());
+            this.application = root != null ? root.application : getScopelikeOrNull(() -> pageContext.applicationScope());
             this.arguments   = getScopelikeOrNull(() -> pageContext.argumentsScope());
-            this.form        = getScopelikeOrNull(() -> pageContext.formScope());
+            this.form        = root != null ? root.form : getScopelikeOrNull(() -> pageContext.formScope());
             this.local       = getScopelikeOrNull(() -> pageContext.localScope());
-            this.request     = getScopelikeOrNull(() -> pageContext.requestScope());
-            this.session     = getScopelikeOrNull(() -> pageContext.getApplicationContext().isSetSessionManagement() ? pageContext.sessionScope() : null);
-            this.server      = getScopelikeOrNull(() -> pageContext.serverScope());
-            this.url         = getScopelikeOrNull(() -> pageContext.urlScope());
+            this.request     = root != null ? root.request : getScopelikeOrNull(() -> pageContext.requestScope());
+            this.session     = root != null ? root.session : getScopelikeOrNull(() -> pageContext.getApplicationContext().isSetSessionManagement() ? pageContext.sessionScope() : null);
+            this.server      = root != null ? root.server : getScopelikeOrNull(() -> pageContext.serverScope());
+            this.url         = root != null ? root.url : getScopelikeOrNull(() -> pageContext.urlScope());
             this.variables   = getScopelikeOrNull(() -> pageContext.variablesScope());
             this.this_       = getScopelikeOrNull(() -> {
                 // there is also `PageContextImpl.thisGet()` but it can create a `this` property on the variables scope, which seems like
@@ -222,12 +222,12 @@ public <T> T doWorkInThisFrame(Supplier<T> f)  {
         }
     }
 
-    Frame(String sourceFilePath, int depth, ValTracker valTracker, PageContext pageContext) {
-        this(sourceFilePath, depth, valTracker, pageContext, Frame.tryGetFrameName(pageContext));
+    Frame(String sourceFilePath, int depth, ValTracker valTracker, PageContext pageContext, FrameContext root) {
+        this(sourceFilePath, depth, valTracker, pageContext, Frame.tryGetFrameName(pageContext), root);
     }
 
-    private Frame(String sourceFilePath, int depth, ValTracker valTracker, PageContext pageContext, String name) {
-        this.frameContext_ = new FrameContext(pageContext);
+    private Frame(String sourceFilePath, int depth, ValTracker valTracker, PageContext pageContext, String name, FrameContext root) {
+        this.frameContext_ = new FrameContext(pageContext, root);
         this.sourceFilePath = Objects.requireNonNull(sourceFilePath);
         this.valTracker = Objects.requireNonNull(valTracker);
         this.id = nextId.incrementAndGet();