I am currently migrating a WinApp to use nhibernate, however I'm experiencing very slow startup times (up to 2 mins!!) due to the creation of the NHibernate configuration. I currently only have 10 tables/classes in my config.

My question is ... is this a typical load time or am I possibly doing something wrong? Should I not be using NHibernate in Windows Apps for this reason? Is it intended to be used with ASP.NET applications due to this heavyweight start-up time?

My config code snippet looks like ...

Configuration cfg = new Configuration();
cfg.AddAssembly("CCCDbLib");
Stream stream = new FileStream(dbConfigFile, FileMode.Open);
cfg.Configure(new XmlTextReader(stream));
return cfg.BuildSessionFactory();

Any help greatly appreciated,

Regards,

Ronan

In your mapping, are you referencing the DTD? I was having the same issue with long loading because I was loading the DTD through the web. The time issue went away when I removed that line.

This is the first 2 lines of one of my mapping files.

<?xml version="1.0"?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.0">

Also, what level is your log4net logging set to? If you have it set to DEBUG then startup can take a long time if you have complex mappings.

Cheers,

Symon.

Thanks for the help!

Actually jd you were spot on. I was referencing the dtd in the mapping docs; took it away and my app starts pretty much instantaneously. I don't know how long it would of taken me to profile and find that.