From fcbf7c97914e282ae031c0d341c8be7d99bcb13b Mon Sep 17 00:00:00 2001
From: kylev <kylev@9fc6cd9a-920d-0410-adcf-ac96716ed7e8>
Date: Mon, 18 May 2009 22:30:19 +0000
Subject: [PATCH] "import" creates GIL overhead every time it is run.  For
 threaded MySQLdb apps, it doesn't make sense to pay that cost for every
 execute(), so lets move some of these imports.

http://wiki.python.org/moin/PythonSpeed/PerformanceTips#ImportStatementOverhead
---
 MySQLdb/MySQLdb/cursors.py | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/MySQLdb/MySQLdb/cursors.py b/MySQLdb/MySQLdb/cursors.py
index 95d98c1..d38cd70 100644
--- a/MySQLdb/MySQLdb/cursors.py
+++ b/MySQLdb/MySQLdb/cursors.py
@@ -6,6 +6,9 @@ default, MySQLdb uses the Cursor class.
 """
 
 import re
+import sys
+from types import ListType, TupleType, UnicodeType
+
 
 restr = (r"\svalues\s*"
         r"(\(((?<!\\)'[^\)]*?\)[^\)]*(?<!\\)?'"
@@ -65,7 +68,7 @@ class BaseCursor(object):
         self.close()
         self.errorhandler = None
         self._result = None
-        
+
     def close(self):
         """Close the cursor. No further queries will be possible."""
         if not self.connection: return
@@ -147,8 +150,6 @@ class BaseCursor(object):
         Returns long integer rows affected, if any
 
         """
-        from types import ListType, TupleType
-        from sys import exc_info
         del self.messages[:]
         db = self._get_db()
         charset = db.character_set_name()
@@ -167,7 +168,7 @@ class BaseCursor(object):
                 self.messages.append((TypeError, m))
                 self.errorhandler(self, TypeError, m)
         except:
-            exc, value, tb = exc_info()
+            exc, value, tb = sys.exc_info()
             del tb
             self.messages.append((exc, value))
             self.errorhandler(self, exc, value)
@@ -216,8 +217,7 @@ class BaseCursor(object):
             else:
                 self.errorhandler(self, TypeError, msg)
         except:
-            from sys import exc_info
-            exc, value, tb = exc_info()
+            exc, value, tb = sys.exc_info()
             del tb
             self.errorhandler(self, exc, value)
         r = self._query('\n'.join([query[:p], ',\n'.join(q), query[e:]]))
@@ -254,7 +254,6 @@ class BaseCursor(object):
         disconnected.
         """
 
-        from types import UnicodeType
         db = self._get_db()
         charset = db.character_set_name()
         for index, arg in enumerate(args):