I shouldn't have said "no difference". Should have written... xrange or while does actually make around a 10% difference. Of course this is nowhere near the 500x performance increase that C# seems to offer, which is why I said "no difference". :)
Thanks, - C On 4/17/06, Chris Trimble <[EMAIL PROTECTED]> wrote: > Did you try making the change on your end and see a change? It makes > no difference on my end. > > BTW, I had tried 'while' before making the original post. No > difference there either. In fact, range() has better performance than > 'while' in CPython for this code! > > - Chris > > > > > On 4/17/06, Dave <[EMAIL PROTECTED]> wrote: > > Use xrange instead of range and there should be a pretty good performance > > improvement;) As is, your for loop creates a list of five million elements. > > A simple while loop would also do the trick although it's not as clean to > > look at. > > > > Dave > > > > [EMAIL PROTECTED] wrote: > > Send users mailing list submissions to > > users@lists.ironpython.com > > > > To subscribe or unsubscribe via the World Wide Web, visit > > http://lists.ironpython.com/listinfo.cgi/users-ironpython.com > > or, via email, send a message with subject or body 'help' to > > [EMAIL PROTECTED] > > > > You can reach the person managing the list at > > [EMAIL PROTECTED] > > > > When replying, please edit your Subject line so it is more specific > > than "Re: Contents of users digest..." > > > > > > Today's Topics: > > > > 1. Sin and Sqrt performance (Chris Trimble) > > > > > > ---------------------------------------------------------------------- > > > > Message: 1 > > Date: Mon, 17 Apr 2006 11:47:35 -0700 > > From: "Chris Trimble" > > Subject: [IronPython] Sin and Sqrt performance > > To: "Discussion of IronPython" > > Message-ID: > > > > Content-Type: text/plain; charset=ISO-8859-1 > > > > IP doesn't do much better than CPython when using math.sin and > > math.sqrt. However, same test in C# dominates (10ms.. as opposed to > > upwards of 5 seconds in IP or CPy). Am I missing something here? > > > > Thanks, > > > > - Chris > > > > ----------------------------------- > > > > import time > > from math import * > > > > def do_timing(f, reps): > > start = time.time() > > f(reps) > > end = time.time() > > print "%s (%d reps): %f" % (f.__name__, reps, end-start) > > > > > > def py_fpfunc_test(reps): > > j = 0.0 > > for i in range(0, reps): > > j += sin( j ) > > j += sqrt( j ) > > j +=2.72392032032; > > print j > > > > def do_all_timing(): > > do_timing(py_fpfunc_test, 5000000) > > > > do_all_timing() > > print "" > > > > > > ------------------------------ > > > > _______________________________________________ > > users mailing list > > users@lists.ironpython.com > > http://lists.ironpython.com/listinfo.cgi/users-ironpython.com > > > > > > End of users Digest, Vol 21, Issue 18 > > ************************************* > > > > > > > > ________________________________ > > How low will we go? Check out Yahoo! Messenger's low PC-to-Phone call rates. > > > > > > _______________________________________________ > > users mailing list > > users@lists.ironpython.com > > http://lists.ironpython.com/listinfo.cgi/users-ironpython.com > > > > > > > _______________________________________________ users mailing list users@lists.ironpython.com http://lists.ironpython.com/listinfo.cgi/users-ironpython.com
