https://review.openstack.org/449771

gistfile1.txt

diff --git a/swiftclient/utils.py b/swiftclient/utils.py
index 08cd7b2..3288fcd 100644
--- a/swiftclient/utils.py
+++ b/swiftclient/utils.py
@@ -297,6 +297,10 @@ class LengthWrapper(object):
         if self._remaining <= 0:
             return ''
 
+        # Thank Martin v. Loewis for this.
+        if size == 8192:
+            size = 64536
+
         to_read = self._remaining if size < 0 else min(size, self._remaining)
         chunk = self._readable.read(to_read)
         self._remaining -= len(chunk)