diff --git a/lib/core/Handles/HandlesImports.py b/lib/core/Handles/HandlesImports.py
index 488285a..126941b 100644
--- a/lib/core/Handles/HandlesImports.py
+++ b/lib/core/Handles/HandlesImports.py
@@ -22,6 +22,10 @@ class ImportHandle(BaseHandle):
     _pyi_cache = {}
     _pyi_cache_dir = None
     _project_root_cache = None
+    # 目录 os.walk 结果缓存（import 失败兜底查找用）：目录 -> [(root, files)]。
+    # 编译进程内 SearchDirsForSubmodule（includes/LibraryPaths/工程目录）内容不变，
+    # 避免每次 import 解析失败都全量递归扫描目录树（PROF：import 热路径高频调用）。
+    _walk_cache: dict[str, list[tuple[str, list[str]]]] = {}
     # 类级 stub 索引：class_name -> list of (full_name, struct_body, file_sha1, from_output)
     # 一次扫描所有 .stub.ll 文件构建索引，避免 _TryLoadStructFromStub 每次调用都全量扫描
     # （原 609 次调用 × ~100 stub 文件 × ~50 行 = 5.5M 正则匹配 → 一次扫描 ~5000 匹配）
@@ -647,18 +651,27 @@ class ImportHandle(BaseHandle):
                         SearchFromDirs = [os.getcwd()]
                     SearchDirsForSubmodule = SearchFromDirs + [os.path.join(TransPyCRoot, 'includes'), os.path.join(TransPyCRoot, 'lib', 'includes')] + list(self.Trans.LibraryPaths)
                     for SearchPath in SearchDirsForSubmodule:
-                        if os.path.isdir(SearchPath):
-                            for root, dirs, files in os.walk(SearchPath):
-                                if '__pycache__' in root:
-                                    continue
-                                for src_ext in ('.vp', '.py', '.vpi', '.pyi'):
-                                    if module_name + src_ext in files:
-                                        FullModulePath = os.path.join(root, module_name + src_ext)
-                                        break
-                                if FullModulePath:
+                        if not os.path.isdir(SearchPath):
+                            continue
+                        # 多级模块名（含 '.'）与 basename 文件列表（files 无路径）
+                        # 永不匹配 `module_name + ext in files`，walk 纯属浪费，跳过。
+                        if '.' in module_name:
+                            continue
+                        # 目录 walk 结果缓存（编译进程内目录内容不变）：import 热路径
+                        # 高频解析失败时避免重复递归扫描 includes/工程目录（PROF 热点）
+                        walk_entries: list[tuple[str, list[str]]] = ImportHandle._walk_cache.get(SearchPath)
+                        if walk_entries is None:
+                            walk_entries = [(r, fs) for r, dirs, fs in os.walk(SearchPath) if '__pycache__' not in r]
+                            ImportHandle._walk_cache[SearchPath] = walk_entries
+                        for root, files in walk_entries:
+                            for src_ext in ('.vp', '.py', '.vpi', '.pyi'):
+                                if module_name + src_ext in files:
+                                    FullModulePath = os.path.join(root, module_name + src_ext)
                                     break
                             if FullModulePath:
                                 break
+                        if FullModulePath:
+                            break
         # fail-fast：模块在所有来源都"完全未知"时立即报错，暴露 import 路径错误
         # （如目录重组后未更新的旧路径）。之前静默容忍导致引用方跨模块 mangled
         # 前缀 fallback 当前模块 sha1，链接期才暴露 undefined symbol。
diff --git a/lib/core/Handles/HandlesTypeMerge.py b/lib/core/Handles/HandlesTypeMerge.py
index 4fe6357..91997eb 100644
--- a/lib/core/Handles/HandlesTypeMerge.py
+++ b/lib/core/Handles/HandlesTypeMerge.py
@@ -37,7 +37,9 @@ class HandlesTypeMerge(BaseHandle):
         """鍐呴儴鏂规硶锛岃繑鍥?CTypeInfo"""
         LineNum = getattr(Node, 'lineno', None)
 
-        self.Trans.DebugPrint(f"[GetCTypeInfo] Node type: {type(Node).__name__}, dump: {ast.dump(Node)[:60]}...")
+        if getattr(self.Trans, 'DebugFile', None):
+            # 仅 debug 模式构造参数（ast.dump 昂贵，非 debug 时无条件执行是隐藏热点）
+            self.Trans.DebugPrint(f"[GetCTypeInfo] Node type: {type(Node).__name__}, dump: {ast.dump(Node)[:60]}...")
 
         if isinstance(Node, ast.Constant):
             TypeName = Node.value
@@ -152,7 +154,8 @@ class HandlesTypeMerge(BaseHandle):
                         if resolved:
                             ModulePath = resolved
 
-            self.Trans.DebugPrint(f"[GetCTypeInfo-Attribute] 查询: '{TypeName}' ModulePath: {ModulePath}")
+            if getattr(self.Trans, 'DebugFile', None):
+                self.Trans.DebugPrint(f"[GetCTypeInfo-Attribute] 查询: '{TypeName}' ModulePath: {ModulePath}")
 
             if ModulePath == 't' and TypeName == 'State':
                 Info = CTypeInfo()