From 37d4f7bc0c3b9c6e2bd858873c691c9d2bf091ae Mon Sep 17 00:00:00 2001
From: "Andrew M. Kuchling" <amk@amk.ca>
Date: Sat, 23 Feb 2008 19:06:54 +0000
Subject: [PATCH] #1389051: IMAP module tries to read entire message in one
 chunk.  Patch by Fredrik Lundh.

---
 Lib/imaplib.py | 2 +-
 Misc/NEWS      | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/Lib/imaplib.py b/Lib/imaplib.py
index 08e15207a43..129de06b48e 100644
--- a/Lib/imaplib.py
+++ b/Lib/imaplib.py
@@ -1147,7 +1147,7 @@ class IMAP4_SSL(IMAP4):
         chunks = []
         read = 0
         while read < size:
-            data = self.sslobj.read(size-read)
+            data = self.sslobj.read(min(size-read, 16384))
             read += len(data)
             chunks.append(data)
 
diff --git a/Misc/NEWS b/Misc/NEWS
index 4d40719e63a..0926e7f0090 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -15,6 +15,9 @@ Core and builtins
 Library
 -------
 
+- Bug #1389051: imaplib causes excessive memory fragmentation when reading
+  large messages.
+
 - Bug #1433694: minidom's .normalize() failed to set .nextSibling for
   last child element.