slow assertion

Test.cs

// The Property Culture is of type CultureInfo
enumarableOfComplexObject.ShouldAllBeEquivalentTo(
   new[]
   {
       new { RefText = "Ref1", Culture = Invariant, Text = "Ref1 en", Component = string.Empty },
       new { RefText = "Ref3", Culture = Invariant, Text = "Ref3 en", Component = string.Empty },
       new { RefText = "Ref1", Culture = German, Text = "Ref1 de", Component = string.Empty },
       new { RefText = "Ref3", Culture = German, Text = "Ref3 de", Component = string.Empty },
       new { RefText = "Ref1", Culture = English, Text = "Ref1 en", Component = string.Empty },
       new { RefText = "Ref3", Culture = English, Text = "Ref3 en", Component = string.Empty },
       new { RefText = "Ref1", Culture = GermanGermany, Text = "Ref1 de", Component = string.Empty },
       new { RefText = "Ref3", Culture = GermanGermany, Text = "Ref3 de", Component = string.Empty },
       new { RefText = "Ref1", Culture = EnglishUs, Text = "Ref1 en", Component = string.Empty },
       new { RefText = "Ref3", Culture = EnglishUs, Text = "Ref3 en", Component = string.Empty },
       new { RefText = "Ref1", Culture = Invariant, Text = "Ref1 en", Component = "Comp1" },
       new { RefText = "Ref3", Culture = Invariant, Text = "Ref3 en", Component = "Comp1" },
       new { RefText = "Ref1", Culture = EnglishUs, Text = "Ref1 en", Component = "Comp1" },
       new { RefText = "Ref3", Culture = EnglishUs, Text = "Ref3 en", Component = "Comp1" }
   },
   o => o.ExcludingMissingMembers().ComparingByValue<CultureInfo>());

This is what the performance profiler says. Its a deep recursion. Could it be the CultureInfo instances? Is it not comparing them by value as it should? CultureInfo has a deeply nested structure, I think.

I would have to analyze it myself. The comparison is trying to some smart things when comparing collections though.

Interesting:

o => o.ExcludingMissingMembers().ExcludingNestedObjects() makes it fast and it asserts correctly (but I would have preferred .ComparingByValue<CultureInfo>());

Even more interesting (this looks like a bug to me):

o => o.Including(t => t.Culture)); will never fail, even if the cutltures differ!