Are you sure that this is really because of Gen0 collections all by themselves, and not because the short cadence of collections leads to a lot of premature Gen

Are you sure that this is really because of Gen0 collections all by themselves, and not because the short cadence of collections leads to a lot of premature Gen1 promotions? I could imagine something like var a = InitGiantArray<Foo>(); var b = InitGiantArray<Bar>(); could leave you with a lot of foo garbage in Gen1 or even Gen2, right were it really hurts. On the other hand I'd be surprised if something akin to do { Tuple.Create(new object(), new object()); } while (true); but with something useful thrown in would suffer much under GC pauses. Looks like I have to test it :I)