Shortcut the entire meta encoding pre-parse when possible

gsnedders · gsnedders · commit 9d1a0fd9ef52 · 2020-06-17T20:18:04.000+01:00
diff --git a/html5lib/_inputstream.py b/html5lib/_inputstream.py
@@ -682,6 +682,9 @@ def __init__(self, data):
         self.encoding = None
 
     def getEncoding(self):
+        if b"<meta" not in self.data:
+            return None
+
         methodDispatch = (
             (b"<!--", self.handleComment),
             (b"<meta", self.handleMeta),
