--- /home/haypo/prog/python/2.7/Lib/threading.py	2014-11-05 15:05:11.432003853 +0100
+++ /usr/lib64/python2.7/threading.py	2015-07-05 16:16:00.000000000 +0200
@@ -306,7 +306,7 @@
         else:
             return True
 
-    def wait(self, timeout=None):
+    def wait(self, timeout=None, balancing=True):
         """Wait until notified or until a timeout occurs.
 
         If the calling thread has not acquired the lock when this method is
@@ -355,7 +355,10 @@
                     remaining = endtime - _time()
                     if remaining <= 0:
                         break
-                    delay = min(delay * 2, remaining, .05)
+                    if balancing:
+                        delay = min(delay * 2, remaining, 0.05)
+                    else:
+                        delay = remaining
                     _sleep(delay)
                 if not gotit:
                     if __debug__:
@@ -600,7 +603,7 @@
         finally:
             self.__cond.release()
 
-    def wait(self, timeout=None):
+    def wait(self, timeout=None, balancing=True):
         """Block until the internal flag is true.
 
         If the internal flag is true on entry, return immediately. Otherwise,
@@ -618,7 +621,7 @@
         self.__cond.acquire()
         try:
             if not self.__flag:
-                self.__cond.wait(timeout)
+                self.__cond.wait(timeout, balancing)
             return self.__flag
         finally:
             self.__cond.release()
@@ -908,7 +911,7 @@
             if 'dummy_threading' not in _sys.modules:
                 raise
 
-    def join(self, timeout=None):
+    def join(self, timeout=None, balancing=True):
         """Wait until the thread terminates.
 
         This blocks the calling thread until the thread whose join() method is
@@ -957,7 +960,7 @@
                         if __debug__:
                             self._note("%s.join(): timed out", self)
                         break
-                    self.__block.wait(delay)
+                    self.__block.wait(delay, balancing)
                 else:
                     if __debug__:
                         self._note("%s.join(): thread stopped", self)
@@ -1143,7 +1146,7 @@
     def _set_daemon(self):
         return True
 
-    def join(self, timeout=None):
+    def join(self, timeout=None, balancing=True):
         assert False, "cannot join a dummy thread"