diff --git a/pytchat/processors/default/processor.py b/pytchat/processors/default/processor.py
index d5e87a8..986e91e 100644
--- a/pytchat/processors/default/processor.py
+++ b/pytchat/processors/default/processor.py
@@ -137,7 +137,7 @@ class DefaultProcessor(ChatProcessor):
                 if component is None:
                     continue
                 timeout += component.get('timeout', 0)
-                chatdata = component.get('chatdata')
+                chatdata = component.get('chatdata')  # if from Extractor, chatdata is generator.
                 if chatdata is None:
                     continue
                 for action in chatdata:
diff --git a/pytchat/tool/extract/extractor.py b/pytchat/tool/extract/extractor.py
index 4647f9d..f7d492b 100644
--- a/pytchat/tool/extract/extractor.py
+++ b/pytchat/tool/extract/extractor.py
@@ -1,3 +1,4 @@
+from typing import Generator
 from . import asyncdl
 from . import duplcheck
 from .. videoinfo import VideoInfo
@@ -60,11 +61,10 @@ class Extractor:
         self.blocks = duplcheck.remove_duplicate_tail(self.blocks)
         return self
 
-    def _combine(self):
-        ret = []
+    def _get_chatdata(self) -> Generator:
         for block in self.blocks:
-            ret.extend(block.chat_data)
-        return ret
+            for chatdata in block.chat_data:
+                yield chatdata
 
     def _execute_extract_operations(self):
         return (
@@ -74,7 +74,7 @@ class Extractor:
                 ._remove_overlap()
                 ._download_blocks()
                 ._remove_duplicate_tail()
-                ._combine()
+                ._get_chatdata()
         )
 
     def extract(self):