Yikes! I'll take a look at this next Tuesday (the entire team is on vacation Until then) - a quick look over the code doesn't show us doing anything too stupid so I'm not sure what the problem is :( But feel free to open a bug in the mean time.
> -----Original Message----- > From: users-boun...@lists.ironpython.com [mailto:users- > boun...@lists.ironpython.com] On Behalf Of Michael Foord > Sent: Thursday, May 27, 2010 9:41 AM > To: Discussion of IronPython > Subject: [IronPython] Performance str.replace in Silverlight > > Hey guys, > > I just tracked down a really nasty performance bug in our Silverlight > application. It turned out that doing a simple string replace in a 400 > character string was taking 700ms. As we actually do two replaces and > the text is usually substantially longer this was a real problem. > > I fixed the problem by switching to explicitly calling the .NET > String.Replace instead of str.replace, so it looks like an IronPython > issue. It doesn't happen with *all* text, but it looks like non-ascii > exacerbates the problem. > > The particular text that triggered it was: > > Die Neuanlage einer Welle muss auch zu Einträgen in der Tabelle > dbo_tv_wellenwebsitesfirmenverbinder führen. Dabei werden die > Zuordnungen aus der Vorwelle bei der Neuanlage einer neuen Welle > einmalig übernommen. Jede Zeile der Vorwelle wird also kopiert und die > Kopie erhält die Welle_uniqueID der neuen Welle. Die Verbindung > zwischen > Website_uniqueID <-> Firmen_uniqueID <-> FirmenAbrechnung_uniqueID > bleibt somit erhalten. > > The replace code was: > > text = text.replace('\r\n', '\n').replace('\r', '\n') > > The fix was: > > text = String.Replace(text, '\r\n', '\n') > text = String.Replace(text, '\r', '\n') > > All the best, > > Michael Foord > > -- > http://www.ironpythoninaction.com/ > http://www.voidspace.org.uk/blog > > READ CAREFULLY. By accepting and reading this email you agree, on > behalf of your employer, to release me from all obligations and waivers > arising from any and all NON-NEGOTIATED agreements, licenses, terms-of- > service, shrinkwrap, clickwrap, browsewrap, confidentiality, non- > disclosure, non-compete and acceptable use policies ("BOGUS > AGREEMENTS") that I have entered into with your employer, its partners, > licensors, agents and assigns, in perpetuity, without prejudice to my > ongoing rights and privileges. You further represent that you have the > authority to release me from any BOGUS AGREEMENTS on behalf of your > employer. > > > _______________________________________________ > 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
