Revert "Faster scheduler"

pkg/scheduler/internal/cache/cache_test.go

@@ -1066,7 +1066,7 @@ func TestNodeOperators(t *testing.T) {
 		if !found {
 			t.Errorf("Failed to find node %v in internalcache.", node.Name)
 		}
-		if cache.nodeTree.NumNodes() != 1 || cache.nodeTree.next() != node.Name {
+		if cache.nodeTree.NumNodes() != 1 || cache.nodeTree.Next() != node.Name {
 			t.Errorf("cache.nodeTree is not updated correctly after adding node: %v", node.Name)
 		}
 
@@ -1109,7 +1109,7 @@ func TestNodeOperators(t *testing.T) {
 			t.Errorf("Failed to update node in schedulernodeinfo:\n got: %+v \nexpected: %+v", got, expected)
 		}
 		// Check nodeTree after update
-		if cache.nodeTree.NumNodes() != 1 || cache.nodeTree.next() != node.Name {
+		if cache.nodeTree.NumNodes() != 1 || cache.nodeTree.Next() != node.Name {
 			t.Errorf("unexpected cache.nodeTree after updating node: %v", node.Name)
 		}
 
@@ -1120,7 +1120,7 @@ func TestNodeOperators(t *testing.T) {
 		}
 		// Check nodeTree after remove. The node should be removed from the nodeTree even if there are
 		// still pods on it.
-		if cache.nodeTree.NumNodes() != 0 || cache.nodeTree.next() != "" {
+		if cache.nodeTree.NumNodes() != 0 || cache.nodeTree.Next() != "" {
 			t.Errorf("unexpected cache.nodeTree after removing node: %v", node.Name)
 		}
 	}