ORM (esp. NHibernate) performance for complex queries

Question

My company is in the process of rewriting an existing application from scratch. This application, among other tasks, performs complex SQL queries against order and invoice data

Answer 1

See this chart. There is no DataObjects.Net for now, but its results in comparison to EF and NHibernate are shown here.

LINQ test code for EF is here; versions for other tools can be found in the same folder. All these .cs files are generated by a single T4 template, so tests are fully identical. Model used there is Northwind.

Few more links:

• LINQ test description
• FAQs.