diff --git a/lib/jasmine-core/jasmine.js b/lib/jasmine-core/jasmine.js
index e1b2ca6d..70298560 100644
--- a/lib/jasmine-core/jasmine.js
+++ b/lib/jasmine-core/jasmine.js
@@ -9407,7 +9407,7 @@ getJasmineRequireObj().Runner = function(j$) {
     #runableResources;
     #runQueue;
     #TreeProcessor;
-    #treeProcessor;
+    #executionTree;
     #globalErrors;
     #reportDispatcher;
     #getConfig;
@@ -9470,7 +9470,7 @@ getJasmineRequireObj().Runner = function(j$) {
         seed: j$.isNumber_(config.seed) ? config.seed + '' : config.seed
       });
 
-      this.#treeProcessor = new this.#TreeProcessor({
+      const treeProcessor = new this.#TreeProcessor({
         tree: this.#topSuite,
         runnableIds: runablesToRun,
         orderChildren: function(node) {
@@ -9480,7 +9480,7 @@ getJasmineRequireObj().Runner = function(j$) {
           return !config.specFilter(spec);
         }
       });
-      this.#treeProcessor.processTree();
+      this.#executionTree = treeProcessor.processTree();
 
       return this.#execute2(runablesToRun, order);
     }
@@ -9565,7 +9565,7 @@ getJasmineRequireObj().Runner = function(j$) {
 
     async #executeTopSuite() {
       const wrappedChildren = this.#wrapNodes(
-        this.#treeProcessor.childrenOfTopSuite()
+        this.#executionTree.childrenOfTopSuite()
       );
       const queueableFns = this.#addBeforeAndAfterAlls(
         this.#topSuite,
@@ -9589,7 +9589,7 @@ getJasmineRequireObj().Runner = function(j$) {
 
     #executeSuiteSegment(suite, segmentNumber, done) {
       const wrappedChildren = this.#wrapNodes(
-        this.#treeProcessor.childrenOfSuiteSegment(suite, segmentNumber)
+        this.#executionTree.childrenOfSuiteSegment(suite, segmentNumber)
       );
       const onStart = {
         fn: next => {
@@ -9627,7 +9627,7 @@ getJasmineRequireObj().Runner = function(j$) {
         this.#runQueueWithSkipPolicy.bind(this),
         this.#globalErrors,
         done,
-        this.#treeProcessor.isExcluded(spec),
+        this.#executionTree.isExcluded(spec),
         config.failSpecWithNoExpectations,
         config.detectLateRejectionHandling
       );
@@ -9648,7 +9648,7 @@ getJasmineRequireObj().Runner = function(j$) {
     }
 
     #addBeforeAndAfterAlls(suite, wrappedChildren) {
-      if (this.#treeProcessor.isExcluded(suite)) {
+      if (this.#executionTree.isExcluded(suite)) {
         return wrappedChildren;
       }
 
@@ -11401,13 +11401,15 @@ getJasmineRequireObj().TreeProcessor = function(j$) {
   const defaultMin = Infinity;
   const defaultMax = 1 - Infinity;
 
+  // Transforms the suite tree into an execution tree, which represents the set
+  // of specs and (possibly interleaved) suites to be run in the order they are
+  // to be run in.
   class TreeProcessor {
     #tree;
     #runnableIds;
     #orderChildren;
     #excludeNode;
     #stats;
-    #processed;
 
     constructor(attrs) {
       this.#tree = attrs.tree;
@@ -11423,34 +11425,14 @@ getJasmineRequireObj().TreeProcessor = function(j$) {
         function(node) {
           return false;
         };
-      this.#stats = {};
-      this.#processed = false;
     }
 
     processTree() {
+      this.#stats = {};
       this.#processNode(this.#tree, true);
-      this.#processed = true;
-    }
-
-    childrenOfTopSuite() {
-      return this.childrenOfSuiteSegment(this.#tree, 0);
-    }
-
-    childrenOfSuiteSegment(suite, segmentNumber) {
-      const segmentChildren = this.#stats[suite.id].segments[segmentNumber]
-        .nodes;
-      return segmentChildren.map(function(child) {
-        if (child.owner.children) {
-          return { suite: child.owner, segmentNumber: child.index };
-        } else {
-          return { spec: child.owner };
-        }
-      });
-    }
-
-    isExcluded(node) {
-      const nodeStats = this.#stats[node.id];
-      return node.children ? !nodeStats.willExecute : nodeStats.excluded;
+      const result = new ExecutionTree(this.#tree, this.#stats);
+      this.#stats = null;
+      return result;
     }
 
     #runnableIndex(id) {
@@ -11517,6 +11499,37 @@ getJasmineRequireObj().TreeProcessor = function(j$) {
     }
   }
 
+  class ExecutionTree {
+    #topSuite;
+    #stats;
+
+    constructor(topSuite, stats) {
+      this.#topSuite = topSuite;
+      this.#stats = stats;
+    }
+
+    childrenOfTopSuite() {
+      return this.childrenOfSuiteSegment(this.#topSuite, 0);
+    }
+
+    childrenOfSuiteSegment(suite, segmentNumber) {
+      const segmentChildren = this.#stats[suite.id].segments[segmentNumber]
+        .nodes;
+      return segmentChildren.map(function(child) {
+        if (child.owner.children) {
+          return { suite: child.owner, segmentNumber: child.index };
+        } else {
+          return { spec: child.owner };
+        }
+      });
+    }
+
+    isExcluded(node) {
+      const nodeStats = this.#stats[node.id];
+      return node.children ? !nodeStats.willExecute : nodeStats.excluded;
+    }
+  }
+
   function segmentChildren(node, orderedChildren, stats, executableIndex) {
     let currentSegment = {
         index: 0,
diff --git a/spec/core/TreeProcessorSpec.js b/spec/core/TreeProcessorSpec.js
index b9e37537..478478af 100644
--- a/spec/core/TreeProcessorSpec.js
+++ b/spec/core/TreeProcessorSpec.js
@@ -33,9 +33,9 @@ describe('TreeProcessor', function() {
         runnableIds: [leaf.id]
       });
 
-    processor.processTree();
+    const result = processor.processTree();
 
-    expect(processor.isExcluded(leaf)).toEqual(false);
+    expect(result.isExcluded(leaf)).toEqual(false);
   });
 
   it('processes a single pending leaf', function() {
@@ -45,9 +45,9 @@ describe('TreeProcessor', function() {
         runnableIds: [leaf.id]
       });
 
-    processor.processTree();
+    const result = processor.processTree();
 
-    expect(processor.isExcluded(leaf)).toEqual(false);
+    expect(result.isExcluded(leaf)).toEqual(false);
   });
 
   it('processes a single non-specified leaf', function() {
@@ -57,9 +57,9 @@ describe('TreeProcessor', function() {
         runnableIds: []
       });
 
-    processor.processTree();
+    const result = processor.processTree();
 
-    expect(processor.isExcluded(leaf)).toEqual(true);
+    expect(result.isExcluded(leaf)).toEqual(true);
   });
 
   it('processes a single excluded leaf', function() {
@@ -72,9 +72,9 @@ describe('TreeProcessor', function() {
         }
       });
 
-    processor.processTree();
+    const result = processor.processTree();
 
-    expect(processor.isExcluded(leaf)).toEqual(true);
+    expect(result.isExcluded(leaf)).toEqual(true);
   });
 
   it('processes a tree with a single leaf with the root specified', function() {
@@ -85,11 +85,11 @@ describe('TreeProcessor', function() {
         runnableIds: [parent.id]
       });
 
-    processor.processTree();
+    const result = processor.processTree();
 
-    expect(processor.isExcluded(parent)).toEqual(false);
-    expect(processor.childrenOfTopSuite()).toEqual([{ spec: leaf }]);
-    expect(processor.isExcluded(leaf)).toEqual(false);
+    expect(result.isExcluded(parent)).toEqual(false);
+    expect(result.childrenOfTopSuite()).toEqual([{ spec: leaf }]);
+    expect(result.isExcluded(leaf)).toEqual(false);
   });
 
   it('processes a tree with a single pending leaf, with the root specified', function() {
@@ -100,11 +100,11 @@ describe('TreeProcessor', function() {
         runnableIds: [parent.id]
       });
 
-    processor.processTree();
+    const result = processor.processTree();
 
-    expect(processor.isExcluded(parent)).toEqual(true);
-    expect(processor.childrenOfTopSuite()).toEqual([{ spec: leaf }]);
-    expect(processor.isExcluded(leaf)).toEqual(false);
+    expect(result.isExcluded(parent)).toEqual(true);
+    expect(result.childrenOfTopSuite()).toEqual([{ spec: leaf }]);
+    expect(result.isExcluded(leaf)).toEqual(false);
   });
 
   it('processes a complicated tree with the root specified', function() {
@@ -127,38 +127,38 @@ describe('TreeProcessor', function() {
         runnableIds: [root.id]
       });
 
-    processor.processTree();
+    const result = processor.processTree();
 
-    expect(processor.isExcluded(parent)).toEqual(false);
-    expect(processor.childrenOfTopSuite()).toEqual([
+    expect(result.isExcluded(parent)).toEqual(false);
+    expect(result.childrenOfTopSuite()).toEqual([
       { suite: parent, segmentNumber: 0 },
       { suite: parentOfPendings, segmentNumber: 0 }
     ]);
 
-    expect(processor.isExcluded(parentOfPendings)).toEqual(true);
-    expect(processor.childrenOfSuiteSegment(parentOfPendings, 0)).toEqual([
+    expect(result.isExcluded(parentOfPendings)).toEqual(true);
+    expect(result.childrenOfSuiteSegment(parentOfPendings, 0)).toEqual([
       { suite: childless, segmentNumber: 0 },
       { suite: pendingNode, segmentNumber: 0 }
     ]);
 
-    expect(processor.isExcluded(childless)).toEqual(true);
-    expect(processor.childrenOfSuiteSegment(childless, 0)).toEqual([]);
+    expect(result.isExcluded(childless)).toEqual(true);
+    expect(result.childrenOfSuiteSegment(childless, 0)).toEqual([]);
 
-    expect(processor.isExcluded(pendingLeaf)).toEqual(false);
-    expect(processor.isExcluded(executableLeaf)).toEqual(false);
+    expect(result.isExcluded(pendingLeaf)).toEqual(false);
+    expect(result.isExcluded(executableLeaf)).toEqual(false);
 
-    expect(processor.isExcluded(parent)).toEqual(false);
-    expect(processor.childrenOfSuiteSegment(parent, 0)).toEqual([
+    expect(result.isExcluded(parent)).toEqual(false);
+    expect(result.childrenOfSuiteSegment(parent, 0)).toEqual([
       { spec: pendingLeaf },
       { spec: executableLeaf }
     ]);
 
-    expect(processor.isExcluded(pendingNode)).toEqual(true);
-    expect(processor.childrenOfSuiteSegment(pendingNode, 0)).toEqual([
+    expect(result.isExcluded(pendingNode)).toEqual(true);
+    expect(result.childrenOfSuiteSegment(pendingNode, 0)).toEqual([
       { spec: childOfPending }
     ]);
 
-    expect(processor.isExcluded(childOfPending)).toEqual(false);
+    expect(result.isExcluded(childOfPending)).toEqual(false);
   });
 
   it('throws if the specified order would re-enter a node that does not allow re-entry', function() {
diff --git a/src/core/Runner.js b/src/core/Runner.js
index 0abfc143..fdf70755 100644
--- a/src/core/Runner.js
+++ b/src/core/Runner.js
@@ -6,7 +6,7 @@ getJasmineRequireObj().Runner = function(j$) {
     #runableResources;
     #runQueue;
     #TreeProcessor;
-    #treeProcessor;
+    #executionTree;
     #globalErrors;
     #reportDispatcher;
     #getConfig;
@@ -69,7 +69,7 @@ getJasmineRequireObj().Runner = function(j$) {
         seed: j$.isNumber_(config.seed) ? config.seed + '' : config.seed
       });
 
-      this.#treeProcessor = new this.#TreeProcessor({
+      const treeProcessor = new this.#TreeProcessor({
         tree: this.#topSuite,
         runnableIds: runablesToRun,
         orderChildren: function(node) {
@@ -79,7 +79,7 @@ getJasmineRequireObj().Runner = function(j$) {
           return !config.specFilter(spec);
         }
       });
-      this.#treeProcessor.processTree();
+      this.#executionTree = treeProcessor.processTree();
 
       return this.#execute2(runablesToRun, order);
     }
@@ -164,7 +164,7 @@ getJasmineRequireObj().Runner = function(j$) {
 
     async #executeTopSuite() {
       const wrappedChildren = this.#wrapNodes(
-        this.#treeProcessor.childrenOfTopSuite()
+        this.#executionTree.childrenOfTopSuite()
       );
       const queueableFns = this.#addBeforeAndAfterAlls(
         this.#topSuite,
@@ -188,7 +188,7 @@ getJasmineRequireObj().Runner = function(j$) {
 
     #executeSuiteSegment(suite, segmentNumber, done) {
       const wrappedChildren = this.#wrapNodes(
-        this.#treeProcessor.childrenOfSuiteSegment(suite, segmentNumber)
+        this.#executionTree.childrenOfSuiteSegment(suite, segmentNumber)
       );
       const onStart = {
         fn: next => {
@@ -226,7 +226,7 @@ getJasmineRequireObj().Runner = function(j$) {
         this.#runQueueWithSkipPolicy.bind(this),
         this.#globalErrors,
         done,
-        this.#treeProcessor.isExcluded(spec),
+        this.#executionTree.isExcluded(spec),
         config.failSpecWithNoExpectations,
         config.detectLateRejectionHandling
       );
@@ -247,7 +247,7 @@ getJasmineRequireObj().Runner = function(j$) {
     }
 
     #addBeforeAndAfterAlls(suite, wrappedChildren) {
-      if (this.#treeProcessor.isExcluded(suite)) {
+      if (this.#executionTree.isExcluded(suite)) {
         return wrappedChildren;
       }
 
diff --git a/src/core/TreeProcessor.js b/src/core/TreeProcessor.js
index 8107c7ee..ff3dba4d 100644
--- a/src/core/TreeProcessor.js
+++ b/src/core/TreeProcessor.js
@@ -2,13 +2,15 @@ getJasmineRequireObj().TreeProcessor = function(j$) {
   const defaultMin = Infinity;
   const defaultMax = 1 - Infinity;
 
+  // Transforms the suite tree into an execution tree, which represents the set
+  // of specs and (possibly interleaved) suites to be run in the order they are
+  // to be run in.
   class TreeProcessor {
     #tree;
     #runnableIds;
     #orderChildren;
     #excludeNode;
     #stats;
-    #processed;
 
     constructor(attrs) {
       this.#tree = attrs.tree;
@@ -24,34 +26,14 @@ getJasmineRequireObj().TreeProcessor = function(j$) {
         function(node) {
           return false;
         };
-      this.#stats = {};
-      this.#processed = false;
     }
 
     processTree() {
+      this.#stats = {};
       this.#processNode(this.#tree, true);
-      this.#processed = true;
-    }
-
-    childrenOfTopSuite() {
-      return this.childrenOfSuiteSegment(this.#tree, 0);
-    }
-
-    childrenOfSuiteSegment(suite, segmentNumber) {
-      const segmentChildren = this.#stats[suite.id].segments[segmentNumber]
-        .nodes;
-      return segmentChildren.map(function(child) {
-        if (child.owner.children) {
-          return { suite: child.owner, segmentNumber: child.index };
-        } else {
-          return { spec: child.owner };
-        }
-      });
-    }
-
-    isExcluded(node) {
-      const nodeStats = this.#stats[node.id];
-      return node.children ? !nodeStats.willExecute : nodeStats.excluded;
+      const result = new ExecutionTree(this.#tree, this.#stats);
+      this.#stats = null;
+      return result;
     }
 
     #runnableIndex(id) {
@@ -118,6 +100,37 @@ getJasmineRequireObj().TreeProcessor = function(j$) {
     }
   }
 
+  class ExecutionTree {
+    #topSuite;
+    #stats;
+
+    constructor(topSuite, stats) {
+      this.#topSuite = topSuite;
+      this.#stats = stats;
+    }
+
+    childrenOfTopSuite() {
+      return this.childrenOfSuiteSegment(this.#topSuite, 0);
+    }
+
+    childrenOfSuiteSegment(suite, segmentNumber) {
+      const segmentChildren = this.#stats[suite.id].segments[segmentNumber]
+        .nodes;
+      return segmentChildren.map(function(child) {
+        if (child.owner.children) {
+          return { suite: child.owner, segmentNumber: child.index };
+        } else {
+          return { spec: child.owner };
+        }
+      });
+    }
+
+    isExcluded(node) {
+      const nodeStats = this.#stats[node.id];
+      return node.children ? !nodeStats.willExecute : nodeStats.excluded;
+    }
+  }
+
   function segmentChildren(node, orderedChildren, stats, executableIndex) {
     let currentSegment = {
         index: 0,