On 28/05/2010 00:02, Dino Viehland wrote:
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.
I thought it was quiet. :-)
Thanks
Michael
-----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
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