Hi ! On Tue, 12 Feb 2013 23:03:04 +0200 Maciej Fijalkowski <fij...@gmail.com> wrote: > > We recently encountered a performance issue in stdlib for pypy. It > turned out that someone commited a performance "fix" that uses += for > strings instead of "".join() that was there before. > > Now this hurts pypy (we can mitigate it to some degree though) and > possible Jython and IronPython too. > > How people feel about generally not having += on long strings in > stdlib (since the refcount = 1 thing is a hack)?
I agree that += should not be used as an optimization (on strings) in the stdlib code. The optimization is there so that uncareful code does not degenerate, but deliberately relying on it is a bit devilish. (optimisare diabolicum :-)) Regards Antoine. _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
