Entity Framework performance whitepaper
The Entity Framework team first published the EF performance considerations whitepaper for EF5 back in April 2012. In May 2014 we updated it to cover and compare EF 4, 5 and 6. We highly encourage people to move up to the latest version of Entity Framework 6 since that's where most of our performance investment is taking place these days.
You can see the entire Entity Framework Performance Considerations whitepaper here: https://aka.ms/efperf
Please leave questions, comments, and requests for improvement in the comments. Thank you!