Move cleanup_models to improve performance.

execution.py

@@ -368,7 +368,6 @@ class PromptExecutor:
                     d = self.outputs_ui.pop(x)
                     del d
 
-            comfy.model_management.cleanup_models()
             self.add_message("execution_cached",
                           { "nodes": list(current_outputs) , "prompt_id": prompt_id},
                           broadcast=False)

main.py

@@ -139,6 +139,7 @@ def prompt_worker(q, server):
         if need_gc:
             current_time = time.perf_counter()
             if (current_time - last_gc_collect) > gc_collect_interval:
+                comfy.model_management.cleanup_models()
                 gc.collect()
                 comfy.model_management.soft_empty_cache()
                 last_gc_collect = current_time