diff --git a/src/bokeh/util/serialization.py b/src/bokeh/util/serialization.py
index a64a504d761..ba94ecccdcb 100644
--- a/src/bokeh/util/serialization.py
+++ b/src/bokeh/util/serialization.py
@@ -20,7 +20,11 @@
 #-----------------------------------------------------------------------------
 from __future__ import annotations
 
+from bokeh.core.types import ID
+from bokeh.settings import settings
+
 import logging # isort:skip
+
 log = logging.getLogger(__name__)
 
 #-----------------------------------------------------------------------------
@@ -247,7 +251,7 @@ def convert(array: npt.NDArray[Any]) -> npt.NDArray[Any]:
     return array
 
 def make_id() -> ID:
-    ''' Return a new unique ID for a Bokeh object.
+    """ Return a new unique ID for a Bokeh object.
 
     Normally this function will return simple monotonically increasing integer
     IDs (as strings) for identifying Bokeh objects within a Document. However,
@@ -257,20 +261,21 @@ def make_id() -> ID:
     Returns:
         str
 
-    '''
+    """
     global _simple_id
 
-    from ..core.types import ID
-
     if settings.simple_ids():
+        # Inline reference to ID to avoid dynamic import and reduce function call overhead.
         with _simple_id_lock:
             _simple_id += 1
+            # Direct call to ID, f-string is fast enough.
             return ID(f"p{_simple_id}")
     else:
-        return make_globally_unique_id()
+        # Inline make_globally_unique_id implementation to avoid extra function frame and import.
+        return ID(str(uuid.uuid4()))
 
 def make_globally_unique_id() -> ID:
-    ''' Return a globally unique UUID.
+    """ Return a globally unique UUID.
 
     Some situations, e.g. id'ing dynamically created Divs in HTML documents,
     always require globally unique IDs.
@@ -278,9 +283,7 @@ def make_globally_unique_id() -> ID:
     Returns:
         str
 
-    '''
-    from ..core.types import ID
-
+    """
     return ID(str(uuid.uuid4()))
 
 def make_globally_unique_css_safe_id() -> ID: