--- C:/tools/bzr-2.6b2o/bzrlib/transport/__init__.py	2012-07-10 11:37:32.000000000 +0200
+++ C:/tools/bzr-2.6b2/bzrlib/transport/__init__.py	2013-03-21 14:22:50.795286000 +0100
@@ -320,7 +320,7 @@
     # TODO: jam 20060714 Do some real benchmarking to figure out
     #       where the biggest benefit between combining reads and
     #       and seeking is. Consider a runtime auto-tune.
-    _bytes_to_read_before_seek = 0
+    _bytes_to_read_before_seek = 100000000
     
     hooks = TransportHooks()
 
@@ -715,7 +715,11 @@
                 #       we are already at the right location. This should be
                 #       benchmarked.
                 fp.seek(c_offset.start)
-                data = fp.read(c_offset.length)
+                max_read = 10000000 # 10MB
+                data = ""
+                while len(data) < c_offset.length:
+                    data += fp.read(min(max_read, c_offset.length - len(data)))
+                # data = fp.read(c_offset.length)
                 if len(data) < c_offset.length:
                     raise errors.ShortReadvError(relpath, c_offset.start,
                                 c_offset.length, actual=len(data))