[IronPython] Strange slowness when loading IronPython.dll

Paul Felix pef at fluent.com
Tue Sep 26 23:09:35 CEST 2006

Hi Martin,

Yes, that's it exactly. My network proxy configuration was kind of
screwed up and .NET wasn't getting to crl.microsoft.com to check the
certificate. After a few attempts and 15 seconds, it gave up.

Thanks for your help.

Martin Maly wrote:
> This is just a guess ...
> The IronPython binaries that we release are signed and part of the loading
> process is signature verification. There is a great post on the .NET
> Security Blog that also talks about the performance...
> http://blogs.msdn.com/shawnfa/archive/2005/12/13/502779.aspx
> Martin
> -----Original Message-----
> From: users-bounces at lists.ironpython.com
> [mailto:users-bounces at lists.ironpython.com] On Behalf Of Paul Felix
> Sent: Monday, September 25, 2006 9:02 AM
> To: users at lists.ironpython.com
> Subject: [IronPython] Strange slowness when loading IronPython.dll
> Hi,
> I'm running IronPython 1.0 on Windows XP:
> IronPython 1.0.60816 on .NET 2.0.50727.42
> Copyright (c) Microsoft Corporation. All rights reserved.
>  >>>
> Something happened on my Windows XP box last week, and now when I start
> ipy.exe, the console window appears, but it takes ~15 seconds for the
> intro string and prompt to appear. Oddly enough, I found that this only
> happens with the Codeplex 1.0 binary distribution. If I build from the
> 1.0 source (release or debug using VS 2005 Professional) and run that,
> it starts up in ~1 second. The Codeplex binary *used to* start up on my
> box just fine about a week ago.
> I'm also embedding IronPython in a C# application, and I found that the
> first time the C# code accesses a class in IronPython.dll, the 15 second
> delay kicks in. The CPU isn't doing anything during the delay, and my
> antivirus software is not doing anything. It seems like it's related to
> the loading of IronPython.dll. Is there any way to trace or debug that
> loading process?
> Certainly, my workaround is the use the version I built myself, but this
> is a head scratcher.
> Any thoughts would be most helpful.
> Thanks,
> Paul
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