title: AutoFixture AutoMoqData gets slow as more tests are added
body: <p>Using nunit 2.6.4 and AutoMoqData the Resharper runner appears to be evaluating all of the parameters to be passed into all tests prior to executing a single test, even if all I want to do is run a single test/small suite of tests. Right now (we have 1000's of tests) it's taking 2-3 minutes to run a single test, which doesn't work for TDD.</p>
  
  <p>I tried switching to Xunit to see if nunit was the issue and there was still a big delay before running the first test.</p>
  
  <p>Is this behaviour to be expected? Or are we doing something wrong?</p>