Jan Kaliszewski wrote: > But the corret results even more distinctly support my thesis -- that for > n=None using n=sys.maxint (consume3) is noticeably faster than 0-maxlen > deque (consume1 and consume2): That advantage may not survive the next release: http://svn.python.org/view/python/trunk/Modules/_collectionsmodule.c?r1=68145&r2=70296&pathrev=70296 Peter