On 2020年5月13日 19:27:57 -0700 Ethan Furman <[email protected]> wrote: > On 05/13/2020 06:04 AM, Antoine Pitrou wrote: > > On 2020年5月12日 11:36:38 -0700 > > Ethan Furman wrote: > >> > >> Also, if a flag is used, won't that slow down every call to zip even when > >> the flag is False? > > > > Why would it? Is that based on a rational analysis of how argument > > parsing works? > > Not the call itself, but the running of zip. Absent some clever programming > it seems to me that there are two choices if we have a flag: > > - have two independent branches (basically `zip` and a `zip_strict` functions > inside `zip` itself) and have the flag select the branch; or > > - have one branch which has extra logic that checks for at least one > StopIteration and at least one item in each iteration to see if it should > raise.
And how much do you think that costs, compared to the overall cost of running the entire zip() function, including consumption of yielded results by the calling frame? _______________________________________________ Python-Dev mailing list -- [email protected] To unsubscribe send an email to [email protected] https://mail.python.org/mailman3/lists/python-dev.python.org/ Message archived at https://mail.python.org/archives/list/[email protected]/message/LDUDSLWQDZNNMSRKKNMOEC7NSVTUEKCC/ Code of Conduct: http://python.org/psf/codeofconduct/