diff --git a/api/core/workflow/nodes/iteration/iteration_node.py b/api/core/workflow/nodes/iteration/iteration_node.py
index 98246d4249..c447f433aa 100644
--- a/api/core/workflow/nodes/iteration/iteration_node.py
+++ b/api/core/workflow/nodes/iteration/iteration_node.py
@@ -1,5 +1,6 @@
 import contextvars
 import logging
+import time
 import uuid
 from collections.abc import Generator, Mapping, Sequence
 from concurrent.futures import Future, wait
@@ -133,8 +134,6 @@ class IterationNode(BaseNode[IterationNodeData]):
         variable_pool.add([self.node_id, "item"], iterator_list_value[0])
 
         # init graph engine
-        import time
-
         from core.workflow.graph_engine.entities.graph_runtime_state import GraphRuntimeState
         from core.workflow.graph_engine.graph_engine import GraphEngine, GraphEngineThreadPool
 
diff --git a/api/core/workflow/nodes/loop/loop_node.py b/api/core/workflow/nodes/loop/loop_node.py
index cca2806a23..11fd7b6c2d 100644
--- a/api/core/workflow/nodes/loop/loop_node.py
+++ b/api/core/workflow/nodes/loop/loop_node.py
@@ -1,5 +1,6 @@
 import json
 import logging
+import time
 from collections.abc import Generator, Mapping, Sequence
 from datetime import UTC, datetime
 from typing import TYPE_CHECKING, Any, Literal, cast
@@ -101,8 +102,6 @@ class LoopNode(BaseNode[LoopNodeData]):
                 loop_variable_selectors[loop_variable.label] = variable_selector
                 inputs[loop_variable.label] = processed_segment.value
 
-        import time
-
         from core.workflow.graph_engine.entities.graph_runtime_state import GraphRuntimeState
         from core.workflow.graph_engine.graph_engine import GraphEngine